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Russian
00:00:02
binary on the topic of pattern in design00:00:04
for beginners with examples on the stove topic00:00:08
very broad topic very large and00:00:10
By the way, I also want to say right away that any00:00:14
Anyone can ask me questions00:00:16
I'm open here if anything happens at once00:00:18
I see, I see the super prize is already coming super00:00:21
great the first question I want00:00:24
ask before I start exactly00:00:28
talking about the topic itself is how much00:00:30
Is anyone even familiar with patterns?00:00:34
is there if anyone what time do people me00:00:37
interested specifically in those who generally00:00:39
didn't hear anything in the patterns00:00:41
there is no design with this at all00:00:42
met at all that he doesn’t know and00:00:45
for the sake of or whatever they heard and I would like00:00:48
I wish everyone who exactly is in this00:00:51
topic and let’s just say don’t analyze anything00:00:54
understand that they should just put it too00:00:57
not pluses about, for example, units per hour00:01:00
so that I just know how many of us there are00:01:01
that is, people who have nothing at all00:01:03
understands this00:01:08
I see here already yes hello hello everyone00:01:11
I see people here already writing that00:01:13
someone already yes there are people who00:01:17
then I don’t understand anything, ok then I00:01:19
I don’t think I’ll delay anymore, let’s do it then00:01:22
begin00:01:23
First of all, I'll introduce myself00:01:26
my name is mirka stage or dna steel00:01:28
whatever you want to call it I am metal00:01:30
stoves for developers I generally work with00:01:32
technologies that are only called upon00:01:34
stove that is wordpress laravel00:01:36
Freiburg sinfonie but sometimes even for me00:01:39
something has to be done for00:01:40
frontend and there, for example, for the budget for00:01:43
reactions and that's all that is most of all00:01:47
I work specifically on stove technologies and00:01:49
how to say in this field of everything00:01:51
figure it out yourself, let's move on to00:01:54
plan for the webinar so that we generally understand00:01:56
where we are heading, what we will do and00:01:59
so on we have a total of 8 topics first00:02:01
I will briefly expand on this introduction00:02:03
empty like here what is it and00:02:06
similar 2 topics this and makeup who00:02:09
generally came up with a pattern and further00:02:11
let's talk why there are patterns everywhere00:02:14
used as they generally do00:02:16
basis for architecture why they are needed00:02:19
use why junior junior00:02:22
I always recommend it to developers00:02:24
pay attention to them and start00:02:26
study because it’s kind of trivial00:02:28
didn't sound like it, but patterns make your code00:02:32
more purely more understandable and about this00:02:34
In general, we’ll talk more about the fourth topic:00:02:37
there will be generative patterns, if anything00:02:40
this type of pattern exists but00:02:42
we also typify mushrooms, only three00:02:44
kind of exists00:02:46
fifth is use by example00:02:48
applications, that is, it will already be00:02:49
practice 6 this is the potter directory on their00:02:52
fingers too song what is the catalog00:02:54
Well, 7 cartridges is just mandatory00:02:57
definitely need to talk about00:02:59
factoring code as patterns for this00:03:01
influences and how they are closely related to this00:03:05
related 8 topic but we are already inciting this00:03:09
the results of everything we did at00:03:11
this webinar and yes, of course I want00:03:14
remind you what to find is visible00:03:17
many courses on specialization in pitching00:03:20
developer which you can go through00:03:21
the first lessons are free so you can00:03:23
find out if this course is right for you and00:03:25
very much and I definitely recommend00:03:28
take a look at it to get a new one00:03:30
learn better but with this income well00:03:33
Well then let's start the vision and00:03:36
What are design patterns anyway?00:03:39
this is exactly what will allow00:03:42
it's much easier for you to design00:03:44
your application is much easier than his00:03:46
develop make your code more00:03:47
flexible to make it more somehow let's say00:03:51
so clean using ready-made frames00:03:53
over time you already know and so on00:03:57
so now so that yes I see another hour has passed00:04:00
just anti-pattern here writes back00:04:02
yes, by the way, I wanted to say Adyghe people00:04:06
I’ll also touch on this topic: what is antipas00:04:08
container as they allow in general00:04:11
so find out if you have any00:04:13
troubles with architecture and so to speak00:04:16
By the way, I also recommend recording and who00:04:20
wants the things I say to be00:04:22
good for the stomach I have it here00:04:23
Let's just say there are small notes on the table00:04:26
if this is a friend, let me just answer00:04:28
remembered what we were talking about, that is, in general00:04:30
the patterns can be said to be ready-made00:04:33
decisions that allow you exactly00:04:35
ready to solve some problem00:04:38
developers often meet but exactly00:04:40
the architectural task is not just there00:04:42
for example, bring out howel you poke there00:04:45
some kind of do while loop parse a00:04:48
precisely the architectural task which00:04:50
is that for example here00:04:53
Let's imagine a situation that I need00:04:56
make sure I have unloading00:05:00
some kind of automatic00:05:02
uploading files to excel format or00:05:05
there are even three formats and instead00:05:07
to copy classes there copy00:05:10
all this code so as not to do something00:05:13
close connection so that this code can be00:05:16
later it was easy to change it was flexible00:05:18
so other developers can understand00:05:19
how does it work we use it there00:05:21
some kind of pattern in the future is still00:05:23
let's talk more and00:05:25
pattern and who even invented them and00:05:28
in general all the movement of patterns00:05:31
design, that is, when let's say so00:05:34
developers started thinking about it00:05:37
begin with00:05:38
1994 when let's say gang 4 is00:05:42
can be called00:05:44
people like four people that is 400:05:47
programmers developers who00:05:48
laid the foundation for this pattern movement00:05:51
and not even movements, but precisely this idea and I00:05:55
I would even call it in some sense00:05:57
development methodology is advertising, well you00:06:01
you can send oregano yourself now00:06:02
richard hell johnson john deal with they like00:06:06
they're releasing a book00:06:08
1994 which is called design00:06:10
patterns where the main patents are posted00:06:13
at that time I immediately want anything else00:06:17
so wait a second let's get distracted strategy00:06:20
I would definitely get this pattern00:06:22
let's look at a small example so here they are00:06:25
publishes a book in general in ninety00:06:27
fourth year which was called for00:06:29
seven subraces of pattern and design00:06:32
Is there any drive like these patterns?00:06:35
design, but that’s exactly the point00:06:38
was that from that moment00:06:40
that movement begins when00:06:42
the developers thought about it00:06:44
how exactly can they make them00:06:46
architecture code cleaner as they00:06:49
do so let's say others00:06:52
developers could parse them more easily00:06:54
code is easier to solve some issues00:06:56
architectural, well, in general it’s simpler00:06:59
speaking of doing architecture cleanly and solving00:07:02
problems quickly somehow without00:07:05
you didn't have to00:07:06
re-study architecture which00:07:09
written by a previous developer who00:07:11
confused or something like that00:07:14
well, yes, I also said exactly that00:07:19
it was these people who laid the foundation and I would00:07:22
I would also like to point out that this00:07:24
the story of pattern B does not end00:07:26
every year everyone opens some00:07:28
other developers00:07:30
why open because well, they are us00:07:33
I can’t come up with some kind of problem myself00:07:35
we meet him we just open00:07:37
method to solve it and00:07:40
catalogs pattern I'll talk about them later but in00:07:43
in general, I just want to say that they are00:07:45
is constantly being updated and I don’t know what it is00:07:48
if you are a developer you need to take and00:07:51
study absolutely all patterns00:07:54
design00:07:55
some basic ones are enough, for example00:07:57
generating00:07:58
there are also several others instead00:08:02
to study there healthy is so simple00:08:05
let's say a large catalog even from me00:08:08
here is the book bonus tricks00:08:10
object-oriented design00:08:12
and here right here is just a whole list00:08:16
cartridges are just very big thick00:08:18
the book is very useful and I don’t know what00:08:21
you need to study the entire list00:08:23
it is enough just to know the basic and00:08:25
use those that fit better00:08:27
for your lan tasks then let's00:08:29
move on why the pattern is everywhere00:08:32
use their advantages00:08:34
as I said that they make it easy00:08:38
solve architectural problems that is00:08:40
if you are dating someone00:08:42
the problem is that it’s like I told you00:08:43
need to create some kind of structure00:08:46
so you don't have to duplicate there00:08:49
somehow a strong cat00:08:52
how do you take it and exactly00:08:56
you use a pattern and so you don't00:08:58
had to00:09:00
duplicate code to make it easier to repeat00:09:03
use and to others00:09:06
the developers could figure it out exactly00:09:08
what you wrote they are exactly00:09:11
used this again is what I00:09:13
I say yes by the way there is someone here00:09:15
comments wrote this gang caught no00:09:18
I don't know that unfortunately00:09:20
but the guys still write books X and00:09:23
materials from them are very useful and00:09:27
always to each pattern if you for example00:09:31
open any00:09:33
just the pattern catalog you can00:09:36
something see this full description00:09:38
pattern of his mental pit diagram by the way00:09:42
who doesn’t know what Yamal is?00:09:44
a lot of Yuma can be done like this too00:09:46
read exactly this here00:09:49
I'll highlight who doesn't know please put it00:09:51
pluses in chat what is it because00:09:54
this is such a let's say language is not00:09:59
modeling programming language00:10:01
namely class schemas into class structures00:10:04
application and with it you can00:10:07
for example, describe the work of some of your00:10:10
worked classes of some part of the code in00:10:13
your application00:10:14
because why am I asking because00:10:17
we'll say exactly that with this one00:10:20
marking we are looking for we will meet I00:10:22
I will cite more than once and as an example when00:10:24
we will watch exactly which one00:10:27
pattern according to I will use the example00:10:30
this is necessary I just I why00:10:33
I'm asking because I want to make sure00:10:34
know how this marking works in order to00:10:37
if anything I could explain00:10:40
it was a scheme yes this is your boardwalk00:10:44
Alexandra wrote this correctly00:10:45
the flowcharts are all absolutely correct00:10:48
it means Pasha understands it well, yes00:10:50
I see there are advantages here, in general I00:10:53
now I will also explain all this and00:10:55
even let me take this book00:11:00
I'll show you what they look like in general00:11:03
approximately like this00:11:06
even I already have it on the next slide00:11:09
the first block diagram that is, here I am a little00:11:12
they are fighting each this is exactly the language with00:11:16
with which you can build00:11:18
the structure of the codes a mile ago was the scheme and00:11:20
even for example now you can00:11:23
see here the picture where we have00:11:25
several classes and where is the interface00:11:28
I immediately say there is a signed interface00:11:31
and for example we have a crater here00:11:34
By the way, I’ll tell you a secret here now00:11:36
one cartridge design with00:11:38
whom we will soon meet and be00:11:40
do practice and00:11:42
that's it00:11:44
by the way, who is the most like this here?00:11:48
Let's just say the attentive one can here00:11:49
see even let's say00:11:53
What00:11:55
your in principle because he is here00:11:59
often used in general patterns and00:12:02
for example, run around class intact background00:12:05
Peter, if anything, I’ll explain this now so that00:12:07
you just understood how it is here00:12:09
classes are designated and here we have00:12:11
there is a creative function which00:12:13
returns an object of type background and that's it00:12:17
for example, this is a dark background, it’s like00:12:20
I would say with a description of this function00:12:23
to and Typhon so that they simply understand that00:12:25
it’s like that, well, it’s glued together from a smartphone00:12:28
also creates new text of its own types00:12:32
this is the interface type background00:12:34
which also allows the new one to inherit00:12:37
object there smartphones flying background features00:12:40
q but in general we’ll talk about all this later00:12:42
speak00:12:44
defat unified language model before00:12:50
well yes yes I can not is some00:12:54
in complex language, that is, without any00:12:57
I think it will be a problem to figure it out well00:13:01
so let's talk about what it's like00:13:02
there is a classification of repeated00:13:04
design00:13:05
the first is the pattern-generating one that00:13:08
makes it easy to create objects00:13:10
classes not with 2 and strong00:13:12
addictions in general why not00:13:14
create in the application strong00:13:16
dependencies between classes I think it is00:13:19
it's even obvious when I say this because00:13:20
that if you think about it like that, it’s obvious00:13:24
that when there is a strong addiction00:13:26
if suddenly you do something by accident like that00:13:29
let's just say by moving each other something00:13:33
will stop working as one part of it00:13:36
Of course, everything may collapse together00:13:39
structural pattern and allows00:13:41
create different connections between objects00:13:43
this is for creating not the objects themselves00:13:44
and the connections between them are behavioral00:13:47
patterns allow you to create effective00:13:49
communication between objects here00:13:51
already as far as communication is concerned, let’s say00:13:54
between class objects and how it all works00:13:57
we'll arrange everything there, too, have our own patterns00:13:59
but we don’t want to give everything00:14:00
attention generating detail but this is not00:14:02
I know that I won’t talk about structural00:14:04
I won’t bring patterns or for example00:14:05
I definitely look like an adapter, for example a00:14:08
strategy as there is also one person00:14:11
wrote in the chat and many others00:14:14
Yes, you still need to remember the principles00:14:17
designing they are here too I have them00:14:20
brought out the first thing, well, always always00:14:25
need to be programmed at the level00:14:27
interfaces and not at the implementation level00:14:32
who doesn’t understand what he just said00:14:35
please write to the chat what I know00:14:37
if someone doesn't understand what exactly I mean00:14:39
in view of programming at the level00:14:41
Vanya interface at the implementation level00:14:43
to explain there is also a second principle00:14:45
which is called this00:14:49
encapsulate everything that is00:14:51
changes, that is, if you have, for example,00:14:54
there are some changes in the class that00:14:56
I mean class variables if anything00:14:59
if they constantly change their00:15:02
values, it’s logical that they are needed00:15:04
encapsulate then make them private00:15:06
and that they have separate functions for00:15:08
working with them, well, that’s what I’ll do too00:15:10
affect and00:15:12
the third principle which is also this00:15:14
composition what is composition if00:15:17
what if someone doesn't know attack if00:15:20
it's easier to say when we00:15:22
instead of00:15:25
just create a new class we create00:15:29
a new class based on some already00:15:30
existing classes and between them00:15:32
there is a connection like this, for example from00:15:35
exist at the university imagine00:15:38
so that there is a university class and00:15:41
he has a faculty and yes and between00:15:45
university faculties have a close00:15:47
connection strong connection because faculty00:15:49
and cannot exist without the university00:15:52
this is an example of a composition because there is00:15:54
this is how it develops, let’s just say this00:15:57
faculties and00:15:58
this is the essence of the composition that we00:16:01
created one big class with00:16:04
some bunch of small ones is what00:16:06
Regarding composition, this is the 3rd type and00:16:12
Well00:16:13
let's move on then, stop00:16:17
give them more I'll ask right away who knows00:16:20
what are the principles solid understands how00:16:22
they work and00:16:24
Is there any point at all in them?00:16:28
pay attention please put00:16:30
pluses in the chat again just to understand00:16:34
So00:16:39
By the way, by the way, the next slide is already00:16:42
I'll switch because we're already here00:16:44
let's start talking about the Paton generators00:16:46
where will we do the practice?00:16:57
hey, I don’t see something very well in the chat00:16:58
someone can still be active with their soul00:17:00
knows about salt they know what it is00:17:03
principles as a result00:17:07
I'll check again now and yes I see00:17:11
plus or minus00:17:12
let's wait a little longer, maybe it's clear00:17:15
until others see here they wrote well00:17:17
Thank you00:17:18
then let's start already00:17:21
talk about damaging cartridges what00:17:23
regarding the principles of salt, I'm not talking about that00:17:26
I'll forget about it yet00:17:28
I will talk and explain what it is00:17:32
in more detail if of course I hope00:17:35
they will forget because after all, now I am00:17:37
I want to draw attention to apb1 and although00:17:40
I want to say that you understand the principles of solid00:17:44
very useful for the pattern because00:17:46
they are often used as I already said00:17:48
when talking about the undyne vorsin principle00:17:51
that they often use the ipad principle themselves00:17:54
principles of fireworks they are often used in00:17:57
padma00:17:58
we are like a leg you said something passing00:18:02
pattern are those cartridges that00:18:03
allow you to conveniently create objects00:18:06
some specific classes here is a list00:18:08
these sub-striking patterns which00:18:11
we will talk we will practice00:18:13
right now we will start00:18:15
the cat can be prepared by someone at the computer00:18:17
its floors will now walk here00:18:20
several repeated there are only five00:18:23
factory method abstract factory00:18:25
loner prototype rulers even I want00:18:27
to say that they are pretty00:18:31
how is it a little that they are simple here00:18:35
Here you can give an example of a composition on00:18:38
stove yes yes I will definitely bring it if I00:18:42
suddenly I forget it happened please me00:18:44
I reminded you that I will do everything and00:18:48
well let's move on then00:18:51
talk at all00:18:53
what else go up to here they write that00:18:57
we will not consider from others00:18:59
there are no groups and we will consider them00:19:01
because we have a lot of time and people00:19:05
there is interest and the first patent with00:19:07
which we begin our entire review with is00:19:09
factory method that defines00:19:12
interface and invite it if anything00:19:14
Now I’m reading the wording that was demolished00:19:16
you can’t write it down for anyone interested00:19:18
hey allowing under classes to change type00:19:21
created objects what is it anyway00:19:23
such00:19:24
because you see this diagram00:19:25
which I already showed you00:19:27
very informative 1 mana hockey and00:19:31
Well00:19:33
let's go then00:19:35
welcome to come method00:19:38
It all starts in the factory method with00:19:41
interface let's imagine the situation00:19:43
here we have a factory creation00:19:45
smartphones yes we know what we have00:19:48
different types of smartphones yes but all of them00:19:51
not even smartphones, you can even take a shared one00:19:55
kind of phones that exist00:19:58
there are some keyboards there, these nokia ones there00:20:00
sony ericsson there next to take some00:20:04
cooler smartphones for example there00:20:06
iPhone right there, some kind of Samsung, well00:20:09
or something else like that and everyone and00:20:11
I know what the phone can do00:20:14
perform the call function and00:20:17
everyone does it in their own way, that is,00:20:20
each phone has its own implementation00:20:22
this and this is where we create00:20:25
call interface that is, the phone interface00:20:29
which will unite, say, into a common group00:20:31
that's all00:20:32
phone numbers we will be here00:20:34
create a smartphone in code, for example00:20:37
belongs specifically to the background type because00:20:39
but he has a telephone and he has his own00:20:42
own00:20:43
the implementation of the call is also for example here00:20:45
we have a goal fund is cool00:20:47
he also has a phone in his own way00:20:49
some kind of implementation of this function00:20:51
using examples the quality of communication so on I00:20:54
I know this is pretty weird right now00:20:56
sounds like I'm explaining the diagram maybe00:20:58
But00:20:59
now is when we start00:21:01
practice it will become more clear00:21:03
that's why I'm opening ours with you now00:21:06
exactly00:21:08
the whole bush studio code and we are now already00:21:12
then let's start developing it like this00:21:14
now then00:21:16
I switch to00:21:17
[music]00:21:19
that is, super I’ll expand a little here00:21:23
more00:21:26
super, the terminal is already open for me here00:21:30
And00:21:32
t-t-t-there is a plantation lecture but I understand00:21:34
what there is no no collection not panda00:21:37
we don't have Trent Reznor's arrow today00:21:39
will00:21:41
solid solid won't fall off00:21:44
use in absolutely any languages00:21:46
50 each and object-oriented00:21:49
programming languages00:21:51
also pattern and design by the way00:21:53
sorry forgot to say that it doesn't matter00:21:55
what language are you programming in the project?00:21:57
design patterns are being developed00:21:59
and principles solid and principles00:22:01
design can be used on00:22:03
any guardianship in an oriented language00:22:05
programming because and so as it were00:22:07
say00:22:10
pattern is a thing that does not depend00:22:13
absolutely from the language of the program this is a thing00:22:16
which is the solution to the problem, so what?00:22:19
let's start then00:22:21
develop and I'm already here creating ours00:22:24
the first file will be our index. stoves00:22:26
and we start with the first pattern00:22:29
which we are considering is factory00:22:32
the method can be immediately launched locally00:22:35
server, by the way, tell me it’s ok already00:22:38
if he sees it, that is, is it visible?00:22:42
my daughter binary code is everything okay?00:22:45
here are the types so you just know if it’s necessary00:22:48
correct here I have already launched local00:22:50
server00:22:51
And00:22:52
well then let's do this one00:22:54
some example with phones, this is it00:22:57
that it was already on the stove00:23:00
let's start by remembering these again00:23:03
that the phone has one thing in common here00:23:07
function is to make calls every there00:23:10
phone type can do it00:23:12
differently and we will have an interface00:23:15
which is called background and00:23:18
it has only one function that is00:23:21
which has no implementation but every00:23:23
new running phone that we will have00:23:25
created it will implement in its own way00:23:27
this call function, that is, for example00:23:29
we will have a class smartphone and it00:23:31
will implement the function in its own way00:23:33
count or for example we will have a class goal00:23:35
background and he will also do it in his own way00:23:37
and it will create smartphone objects00:23:40
That's why it's called a factory00:23:43
pattern factory factory method what00:23:47
this is the factory it will be let's say00:23:49
class main super class which00:23:52
implement yourself interface background and it00:23:56
and will create others of all types00:23:58
smartphone00:23:59
well let's do it then00:24:03
creating our first00:24:05
interface then we will have a simple00:24:07
pan interface is not mandatory if anything00:24:10
write the name background interface and how I00:24:13
spoke on any phone00:24:15
has one function, it doesn't ring a bell00:24:19
this is if we have only one example00:24:21
function because when will I speak00:24:22
about the abstract factory there will be everything00:24:24
much more difficult00:24:25
that's basically what we have here00:24:27
interface background as we know interfaces00:24:30
there is no implementation of functions because in00:24:33
all this begins to implement itself00:24:35
already other classes and in this case here00:24:37
we have00:24:39
flask method and every next smartphone00:24:42
which will be created it will be00:24:43
inherit exactly this function ok00:24:47
the next step is to create our00:24:50
factory it can be called background factors00:24:53
whatever you want to call it00:24:56
and here is what will happen to us00:25:00
we will be contacted00:25:03
or fund factors in no case00:25:06
implement yourself interface there00:25:09
only has an addiction to it and00:25:12
but precisely the objects that will00:25:14
created through this class by smartphone00:25:17
and the fun factory creates just that00:25:20
new smartphone objects that will00:25:24
implement yourself00:25:25
the interface is fun and will be in its own way00:25:27
implement the recall function, that is00:25:29
bell function00:25:31
Well, to put it simply, the whole logic00:25:34
fun factory lies precisely in00:25:36
just to simply00:25:39
namely to create new types of smartphones00:25:42
so let's get started right away00:25:44
create00:25:45
the first function that is on the plates here is00:25:48
for example create salton meet RF00:25:50
it will not return the background and00:25:55
we have just come back new00:25:58
an object00:26:03
the following functions we will have it00:26:05
create00:26:10
the phone is also being returned because00:26:13
what class c said they designed a smartphone00:26:17
they implement themselves interface fund00:26:19
which00:26:20
gives them a mandatory function implementation00:26:24
castle00:26:26
under create in general and yes exactly here00:26:30
you can see00:26:33
just like that00:26:36
then how exactly will the century be created00:26:39
so just a second, consider the preview of the java section with00:26:42
mines someone can see toxic for a second00:26:46
sorry sorry I forgot to join I think00:26:50
it will be better that way00:26:53
I stretched it out a little here too00:26:58
falling I see now I think better00:27:03
in general, yes, we have a fun factory00:27:06
and there is a main class that will00:27:08
create us new phones that we have00:27:11
us to implement ourselves this one00:27:13
interface background interface that is it is00:27:16
3rd grade has a cat which was said in00:27:18
wording before00:27:20
what do we get next we need00:27:23
create further workshops and00:27:25
class smartphone00:27:28
In general, by the way, the example is very simple, but I00:27:31
I'm trying to say it as much as possible now00:27:34
to explain it so simply00:27:36
there were no questions afterwards00:27:39
we are now creating exactly the saphon class00:27:43
there is just some kind of masonry00:27:47
a phone that has everything of its own00:27:50
own implementation of which function00:27:52
spoke and00:27:54
By the way, if anyone doesn't know what it is00:27:56
general interface it can be said like this00:27:59
well not exactly stripes00:28:03
something like classes which where are you00:28:06
you simply describe the functions that should00:28:09
must have some specific00:28:11
class but implement them in your own way00:28:13
so that's why we have for example00:28:15
here is the cola function, for example we have tisiz00:28:18
smartphone and brick phone but they are both00:28:21
implement this function of flasks differently00:28:23
because for example it's a cool phone00:28:25
maybe it's different there00:28:27
there to compress the connection and there is a smartphone00:28:30
for someone else to do something and when we create00:28:33
For example00:28:34
we definitely need a new class00:28:38
create in it all the functions that exist00:28:40
are registered in the interface in our case00:28:42
there is a call implementation here00:28:44
keys on the phone and here for example00:28:45
will write hello, I'm calling, calling00:28:50
you'll fix it but00:28:51
let's better go there00:28:54
smokie 303 or whatever this one is00:28:56
was called00:28:59
102200:29:01
so in general we have a keyboard00:29:04
phone now let's create a smartphone00:29:08
this is another class we have which is also00:29:11
in its own way release a lot of call functions00:29:16
we imitate here00:29:19
he interface and now you need a smartphone00:29:24
implement call functions for yourself00:29:26
here we open the floor and here we are00:29:29
we will not attribute00:29:31
Hello00:29:33
I'm calling from my smartphone00:29:39
from ready and00:29:42
so that we can see the flow, let's take a look00:29:45
then it means we can do it like me00:29:50
here I formatted a little bit of standards00:29:53
So it turns out that we have a goal00:29:55
background again we have a goal background00:29:57
there are these two classes in March00:30:00
implement yourself interface background00:30:02
the interface is just a background and00:30:06
when do these 2nd grades start00:30:09
implement this interface with00:30:11
using implements background they do what00:30:14
they must have their own way00:30:16
implement call functions like I already did00:30:19
said that the interface allows00:30:20
define some general functions of the class00:30:23
which he must implement for00:30:25
some group of even classes that00:30:28
must still exist in these classes00:30:30
but the implementation in each class of this00:30:32
functions will be different in our case00:30:34
there is a whole background for the class and a general smartphone00:30:37
function for relays that are mandatory for00:30:40
implementations are count and cell phone00:30:43
a keypad phone will do things in its own way00:30:45
calls and smartphones in their own way00:30:47
does what concerns the background factors fun00:30:50
factory in our case this is exactly00:30:54
that is precisely the factory method that00:30:56
allows you to create new objects here00:30:59
these two classes00:31:02
not directly, but through00:31:05
special functions and00:31:08
even you can remember this diagram that00:31:11
it was shown there, that is, he is in my00:31:13
target background and view she has a smartphone that is me00:31:15
I hope this is already in your head somehow00:31:16
I'm doing my best and by the way I see Andrey here00:31:19
I wrote in the chat nokia 303 331000:31:23
then according to the fix, this is a little narrower00:31:26
I forgot and it turns out that this is exactly00:31:29
fun factory this is a factory method00:31:31
which allows us to create or on00:31:34
you can't call a new type of smartphone00:31:36
what about this factory after all?00:31:39
then we'll test it now and then00:31:42
I'll demonstrate how it works00:31:44
of course, as I did here in social security00:31:47
namespace because after all00:31:50
our example is somewhat simple and therefore00:31:52
meaning00:31:54
there is no legroom00:31:57
then let's go straight to the background interface because00:32:00
what will we have first?00:32:02
call, give the link, we’ll connect and00:32:08
next thing we connect and we00:32:10
connect a class smartphone here00:32:15
and of course the very end of our factory00:32:18
creating new class objects has become a background00:32:21
and a smartphone that implements itself00:32:24
interface background interface in its own way00:32:26
implements the count function00:32:28
also connect from here00:32:31
than the practical meaning of this I am now00:32:35
by the way, I'll explain00:32:37
Now I’ll even explain with an example of how00:32:40
I had it on for starters let's00:32:43
In general, we’ll test it all now00:32:48
and by the way, now everyone after00:32:50
let's test you can ask absolutely00:32:52
completely any question and what is not clear00:32:54
so that I can answer this and so that we00:32:57
basically everyone could move on00:33:00
starts with what you can notice00:33:02
that we have one factory here, that is00:33:04
we don't have to somehow create each00:33:07
running separately we have a factory00:33:09
which can in some sense00:33:10
groups these two classes whole background and00:33:13
smartphone00:33:14
and for example, I want to create for example00:33:16
get yourself a keypad phone00:33:19
I do not create it through the classes themselves00:33:22
we don't create for lunch, I just create you00:33:24
through the factory I'm here taking and calling00:33:28
function stick your virginity yes00:33:32
here I am creating a new masonry object00:33:35
phone I want a smartphone I'm creating for myself00:33:37
new smartphone00:33:38
yes and00:33:40
this is where we get to the heart of the matter00:33:45
the logic of what is being created cannot be tolerated00:33:47
factory00:33:49
what is being created please tell me what00:33:52
you just pretend to00:33:54
a little question about Nepal00:33:56
it's just00:33:59
later we will talk about becoming an agent00:34:00
by the way, about a lot of interesting things00:34:02
much simpler in general let's see what00:34:05
we have a factory00:34:06
which creates these types of objects00:34:09
that is, object classes00:34:11
you can just look like this here00:34:14
is creating some kind of00:34:15
a specific group of objects00:34:18
which from the classes which has in common00:34:20
the interface is occupied by only one class00:34:22
this is the first thing you need to notice00:34:24
there is this fun factory and00:34:26
interface gives these two classes again I00:34:29
I repeat sorry that sometimes I can00:34:31
repeat I just want it all00:34:32
remember that the target is the background and smartphone00:34:35
improvise yourself interface background00:34:37
interface or just background with implementation00:34:41
call functions but each of these classes00:34:43
implements the call function in its own way00:34:45
the smartphone will be somehow from00:34:47
call and the keypad phone in its own way and00:34:50
we create these new objects or on00:34:53
through special factor and factor this00:34:55
special let's say factory00:34:58
which creates for us new objects of this00:35:00
and even here you may not necessarily00:35:04
just don’t think that during the course everything is somehow00:35:06
this is how it will be00:35:09
to always be back only00:35:12
but the object here can be done in your own way too00:35:14
customize the creation of new objects00:35:16
in general, let's have shame in it00:35:20
then create a new object and00:35:21
I can do it my way here in each case00:35:24
call your own implementation00:35:27
function count of these two objects that is00:35:30
Here, for example, places the fund in its own way00:35:32
I implement into light from the function, that is, with00:35:34
of his realization to ask he to call this00:35:36
function of a smartphone with its implementation00:35:41
So00:35:45
if creating a phone or smartphone00:35:48
clogging depends on some variable00:35:50
amounts this is interesting this is interesting then00:35:53
is you mean that if for example00:35:55
we have the creation of new objects00:35:59
yes that is, if we need to implement00:36:01
creating a new object00:36:04
there's a smartphone or there's a phone just from00:36:09
some variable so that it depends00:36:11
from this but it can be done in a simple way00:36:14
checks, that is, it does not depend on00:36:16
right in the thick of it00:36:18
what we mean here is exactly what we have00:36:21
there is a common group of phone classes00:36:23
for example, a cell phone smartphone is also there00:36:25
some may be so that00:36:28
it wasn’t like we had them separately00:36:30
create their objects00:36:32
then here we use fanfiction you00:36:36
which each one creates for us separately00:36:38
new class object and00:36:41
as a result, we can continue with them00:36:44
use it but you don’t need it here yet00:36:46
all each of these phone classes00:36:49
having your own implementation function is one thing00:36:51
yes let's read further here00:36:53
questions that is, in general, so that the crowds in00:36:56
answer to if creating a phone or00:36:58
smartphone depends on some variable00:37:00
the amounts here could be simply done00:37:02
the most common check00:37:04
exactly00:37:05
or00:37:07
and inside cos a fun factory itself00:37:11
or here just right for at least00:37:13
check there I don’t know what kind of change00:37:15
well, or better yet, I would have done it00:37:18
then inside the fun factory because I00:37:20
I say that there may be implementations here00:37:21
do for example if we had00:37:23
let's imagine what we have00:37:24
from private variable00:37:28
for example I don’t know the account there00:37:31
balance yes here we turn to it00:37:34
to check your account balance there00:37:38
there is no longer there for example a herd that is00:37:41
this is how I see it could be00:37:43
implement00:37:44
I also think it’s better to do it anyway00:37:46
checking against some change specifically00:37:49
inside the fact itself and and convey already00:37:52
there is a balance within itself00:37:54
constructor this can also be done this way00:37:57
if we added properties type class a00:38:00
it would be cool if they didn’t create the texture00:38:02
would each class be a separate function?00:38:05
I completely understood00:38:07
this is a factory method this is just a factory method00:38:10
method factory factory method that is00:38:12
can you say this in general about her?00:38:14
talk factory method abstract00:38:16
the factory there everything is much more interesting there00:38:19
we create separate factories if we00:38:21
for example, they just created one here00:38:23
a factory that creates objects for us00:38:25
class that being with an abstract factory we00:38:27
first we create separate factories, how many00:38:30
we want and through them we can create00:38:33
more much more different let's say00:38:36
class objects so let's do it already00:38:38
let's go to the browser because00:38:42
we need to test our flow00:38:45
here it turns out like this now I’ll create it00:38:47
new window00:38:49
I'll open it now, let's take a look right away00:38:53
localhost 8000 until we open now00:38:58
the cookies00:39:01
window capture00:39:05
that's all we got00:39:08
makes it obvious that everything is very simple we00:39:10
called00:39:12
just for the function, that is, hello00:39:15
I'm for down nokia 3033 10 2020 at00:39:19
call this smartphone00:39:20
gives in to the logical question of what00:39:24
the point of it all let's do it again now00:39:26
let's take exactly the diagram we have00:39:29
was shown to you00:39:32
look at him, I think you are00:39:34
here you can see the essence by the way00:39:38
not here I would like to say something like this00:39:41
what is the version of the factory that showed00:39:42
called symbol factors are also here00:39:44
a little different version watch00:39:47
carefully00:39:48
we have it here, it's just me00:39:51
I had a version without, let's say00:39:54
these two let's say classes in this00:39:57
case and00:39:59
here for example I had just here00:40:03
one plant, that is, if we have for example00:40:05
background crackers smartphone creator then I have00:40:08
in my case there is only one plant which00:40:10
created me objects of classes target background and00:40:14
smartphone which you will take over00:40:16
interface but they implement it in their own way00:40:22
more immediately 2 ask and ask00:40:25
be sure to ask questions that you don’t need here00:40:26
I see because I'm now let's00:40:28
I’ll repeat again, what is it used for?00:40:31
this one so here we have some00:40:34
certain classes like this one00:40:36
we had phones that has some kind of00:40:38
one common function that is mandatory00:40:40
must exist in everyone00:40:43
just like that00:40:46
Let's say this in this class and let it be00:40:48
convenient to create and run from these classes00:40:50
we create a separate super class which00:40:53
creates types00:40:56
it creates these objects of these classes00:40:59
to which the interface was inherited00:41:01
which00:41:02
let's say do it so as not to00:41:04
necessarily implemented one common00:41:06
function only from its implementation and in00:41:10
in general, with the help of a creator, that is,00:41:12
in our case it was the background facts we00:41:13
create new objects there of any class00:41:16
which we need is a siphon there or there00:41:20
smartphone because in general we could00:41:22
create separate cell phone factors or00:41:24
there are smartphone facts that would also happen00:41:26
right and they could do it at all00:41:28
inherit even an abstract class00:41:31
will hide what would also be correct00:41:32
example00:41:35
yes yes, Andrey wrote it very correctly00:41:39
in fact, the factory creates instances00:41:41
class with a certain method of general00:41:43
interface yes there is a common interface yes00:41:45
there is a common interface with a common function and00:41:47
every class you can get into the factory00:41:51
just combines all these classes00:41:53
which have one common function only00:41:56
with their implementation and they are still00:41:58
incriminate themselves from the interface and00:42:00
thanks to this factory we can calmly00:42:02
create all these just such objects00:42:06
and all these objects but classes00:42:10
[music]00:42:11
created by the object they depend precisely00:42:13
interface from interface here00:42:15
this principle is adhered to00:42:17
said to program at the level00:42:19
interfaces and not at the implementation level00:42:21
what is this anyway because I00:42:24
it seems when there was an introduction it wasn’t quite00:42:27
told me what it is00:42:29
interface level programming00:42:31
that's what you just saw00:42:33
there was programming for the interface on00:42:35
interface level because we created00:42:37
interface that united let's say00:42:40
group faucet class in our case group00:42:43
class you there phone and up00:42:45
prescribed common functions that are for them00:42:48
exists in our case this is the count that is00:42:50
every phone can make a call00:42:52
united this group and these classes there00:42:55
phone they depend on this interface00:42:57
and this already allows us to say so00:43:01
group first and second00:43:04
This00:43:05
gives an immediate sign that each class00:43:09
implements this function in its own way and this00:43:12
often used it is very useful00:43:14
because this way we can say00:43:17
so share all this and all this in general00:43:22
let's say it's convenient to do and create00:43:24
objects precisely through the factory so that we00:43:26
were not created separately so that everyone00:43:27
new class objects were created through00:43:29
factory so that this is even delegation00:43:32
it also shows what it is00:43:34
delegation00:43:35
this whole design topic is00:43:38
when we, instead of ourselves00:43:40
create an object this is passed to some00:43:42
not not always even by the creation of this we00:43:44
we call certain methods that00:43:46
other classes will perform there00:43:49
fulfill00:43:50
work00:43:52
some value let's say structure00:43:55
that is, we can say 1 2 on00:43:57
structure where everything from let's say00:44:02
built with small classes which are in00:44:05
in general, in the end it does some kind of00:44:07
one common function just everything is much00:44:11
clearer and structuring can be done too00:44:13
this is how to describe it00:44:15
so let's move on00:44:18
that means we had a factory method00:44:20
the person asked for the strategy I want00:44:24
talk about it right now00:44:26
pattern because there will be a lot here00:44:28
interesting funny example I prepared00:44:30
so I'll turn off window capture for now00:44:32
I'll switch to our code right away00:44:37
please ask questions what to whom00:44:39
it was unclear to whom exactly00:44:42
factory method and so on00:44:46
so I just know so I can explain00:44:48
Now00:44:50
as long as there is someone in the chat there will be something00:44:52
write, I’m deleting all these for now00:44:54
let's even give an example for strategy00:44:57
now let's create a separate folder00:45:01
for ours with you00:45:03
It’s easy to create a public page here00:45:06
factory folder and here00:45:08
I'll upload all the other files that00:45:11
we created this factory folder here and00:45:13
let's create a new folder right away00:45:17
which should be called00:45:21
we will have an example with ducks here, let's say00:45:25
So00:45:27
Let's just imagine a situation like this00:45:32
you have a task when you need it00:45:36
create different types of ducks yes that is00:45:39
there00:45:40
for example there is some kind of red vodka00:45:43
you can come up with whatever you want00:45:45
iron grip or you know the hunters00:45:48
use some kind of aromatic duck00:45:50
to attract other ducks find yes00:45:52
and let’s imagine a situation where we00:45:54
we need to clearly do so that we can00:45:59
anyway00:46:02
create correct classes of duck objects00:46:06
however, we didn’t have to somehow00:46:08
inherit other unnecessary methods there00:46:11
we really need to call here00:46:13
add some of our duck there too00:46:19
in general there are functions of the class and so on00:46:24
I’ll repeat the rural questions about00:46:27
pattern factory just so I know00:46:29
if there are any misunderstandings at all00:46:31
write absolutely all the questions that00:46:33
you think there is I, of course there is we00:46:36
for now let's start with the example of ducks and00:46:40
let's think about what a duck actually does00:46:42
well, in our case, to make ore00:46:44
a duck can eat us, for example, but00:46:46
there is a day that can fly but cannot fly00:46:49
flying is the first characteristic that00:46:51
which we will have to pay attention to00:46:53
attention we need to do so00:46:54
you could choose the duck can fly00:46:56
or not00:46:58
next thing we need to do00:47:00
this is just the same00:47:04
for example, vodka, be able to quack there and00:47:07
the second thing we need will be implemented00:47:10
this is what you need to choose and do00:47:13
its implementation is precisely quack here00:47:16
it's best to use it00:47:19
pattern is not a factory method, namely how00:47:23
anyway00:47:25
strategy what does the strategy pattern do00:47:29
we can say that it determines00:47:31
family of algorithm in which it00:47:33
exists and each of them encapsulates00:47:36
into yourself00:47:38
these are the common ones00:47:40
characteristics and provides them with these00:47:43
all class and you, regardless of the angle00:47:47
1st grade you can do them regardless00:47:49
modify what exactly gives00:47:52
just a weak connection, which is very00:47:55
useful and used on the side00:47:57
client00:48:00
Today we are only generating patterns and00:48:03
look no not only generating even00:48:05
right now what I wanted to say is we already00:48:08
look at a non-generating pattern00:48:11
I forgot a little about which group00:48:13
structural cartridges is the strategy00:48:16
if I'm not mistaken neos generating yet00:48:19
not everything I'm just a person wanted to see00:48:22
on strategy and I just want to show00:48:25
exactly this pattern00:48:27
so let's do something quicker00:48:30
Let's take a look and then come back to00:48:32
generating00:48:34
well as I said torture and can fly00:48:37
in our example and can croak whatever00:48:39
it's all to do so that it's all in00:48:41
independently of each other00:48:43
the first thing we will have here we will have00:48:47
the interface, of course, wouldn’t be wet without it00:48:49
interface00:48:51
for each type y so for implementation00:48:55
it is the issue of flight that will be created00:49:00
use a separate class which00:49:02
will, for example, give up to 20 ducks like her00:49:06
must fly yes she will be here just00:49:09
interface fly interface let it be so00:49:12
be called where be just on00:49:13
function just just function flight00:49:16
if then00:49:17
again with mine that there is vodka which00:49:20
can't fly and what else should we have00:49:22
what other interface should we have?00:49:24
be it quacking that is just00:49:28
the frog should not be confused because I00:49:30
I say clock in general yes give it00:49:33
let's create yona will be here00:49:35
exactly one function that allows00:49:37
quack the ducks then00:49:40
this is also a public method00:49:44
croak and ready super great then we00:49:50
what we need to do next is imagine00:49:52
the situation that we have ordinary00:49:55
some kind00:49:56
so wait a second I wrote a question here00:50:00
one patent may contain another or00:50:02
others, yes maybe, absolutely like that00:50:04
maybe it's called related patterns in00:50:08
We won’t consider this today, but00:50:09
there is one and then you can say00:50:13
harmonious interactions with each other00:50:15
the paste is built into a harmonious00:50:17
interaction between your Paton and00:50:19
back to the topic00:50:20
let's first create a class here00:50:24
which will indicate vodka that it00:50:26
can fly with wings that is a duck00:50:28
who can fly with wings can00:50:30
use this class flags00:50:32
sphinx lazy sphinx and immediately logical00:50:37
come to the conclusion that we should be here00:50:41
increment the interface00:50:43
[music]00:50:45
exactly00:50:49
interface to interface exit simply00:50:52
install and00:50:53
here we have a public function with00:50:56
by its implementation, that is, if for example00:50:57
this is like the eye that is responsible for00:51:00
then to fly with wings then00:51:02
here we will simply output for example00:51:06
flight or00:51:10
Let's imagine the situation that we have00:51:12
now it is00:51:13
like name is Alex that is to fly without wings00:51:17
there will also be its own implementation of the function00:51:20
fly from the interface fly interface that is00:51:22
these two class of life with wings to00:51:24
fly me for tanks implements in its own way00:51:26
flight function for ducks further00:51:30
let's have class00:51:32
name is Vince00:51:35
compliment00:51:36
la interface00:51:39
I will repeat again if anyone has00:51:41
some questions are a must now00:51:43
hear so that you can simply answer like this00:51:46
there is a plo function and here it will be simple00:51:47
write us and I just can’t fly00:51:50
will00:51:54
Fine00:51:56
it behooves me to do it this way00:52:03
how many times does he encounter00:52:05
all implementation of the pattern by the developers00:52:07
examples from books on wheelbarrows and00:52:10
only these could bring real ones00:52:11
which I can face00:52:14
example if you are interested Konstantin00:52:17
which concerns me personally which00:52:19
had your own files or an example00:52:23
even more of all this concerned precisely with00:52:27
work and if so you are interested but00:52:29
come on now we don’t need the car00:52:33
newbies, well, I don’t agree with you here00:52:35
because still to understand00:52:36
structure needed a trivial example00:52:38
bring and so on so let's00:52:40
we come back and fly wizard winx that is00:52:43
fly with wings like I said she's boobs00:52:47
. means it can’t have two classes00:52:49
flyers swings and fly wizard winx that is00:52:53
it had the function of flying shot or00:52:55
without but this one depending on what you have00:52:57
we will be a duck because he said that00:52:59
duck byte different imagine00:53:01
the situation that we have for example now00:53:04
general class00:53:06
which is called dark and00:53:09
what will be the essence of the situation with00:53:14
using this class we will create00:53:16
all the fishing rods that are convenient for us00:53:20
here we create a class like this00:53:23
just a duck and00:53:26
take away from the construct00:53:28
constructor must be created00:53:31
now I'll explain why and00:53:34
or here we meet already00:53:36
just an interesting moment00:53:39
there is a private function00:53:42
whose function, for example, is responsible for00:53:45
fly by kate clapp00:53:47
or something like that00:53:50
this variable will be stored as00:53:52
after all, one of the objects of our class00:53:55
who is in charge of the flight and we are in00:53:57
in the future we will call you to fly00:53:59
so here we write fly by him a00:54:05
equals like a fever which we will00:54:08
pass it through the constructor00:54:11
folding now with croaking function00:54:14
let's have a little00:54:16
before we wait and figure it out first00:54:19
exactly the back so that .00:54:21
could fly and what do we see here00:54:25
right here in the class constructor00:54:28
there is a point in the class we will transfer00:54:30
new object or flags sphinx or fly00:54:33
wizard and does not cost 100 what is responsible for00:54:35
flight00:54:36
this is where the new object is inserted00:54:38
one of these classes or something else00:54:40
someone who is responsible for the flight00:54:42
to yours on the site00:54:43
flight we have a private fly function00:54:47
quiet, let me do encapsulation right away00:54:51
to hide this variable of others00:54:53
classes00:54:55
this is where we will call this00:54:58
question that concerns but let00:54:59
call00:55:01
fly by her to make a flight like us00:55:05
make alpha and immediately appears00:55:06
the question is how it will work here00:55:09
you can already guess that we can either00:55:11
use the abstract class so that00:55:14
make a big abstraction to00:55:17
then somehow inherit this function00:55:19
but in the data in this case so that it is00:55:21
simpler, let's fly in our case00:55:24
let's do it00:55:26
here we have fly and00:55:30
how will the fly function be called even00:55:32
you can guess what could happen here00:55:35
and for the meter there is some kind of interface there00:55:36
general vodka but this is not needed yet and00:55:39
yes roll out the date that caused mine00:55:43
biheight00:55:44
here owes the fly function00:55:48
Well, actually we have some kind of duck and this00:55:51
the general type that is issued is created00:55:54
that in the future it turns out that we00:55:58
when you create new types like this00:56:01
there is, for example, some kind of red duck there00:56:03
something like that we should always00:56:05
we will indicate exactly how00:56:07
must fly and this is indicated precisely with00:56:10
with the help of these two classes there if00:56:12
that class classes can be limited00:56:15
not only this quantity can be created00:56:17
I know other classes like a car00:56:20
fly but this is purely for example00:56:25
what we can do next we can00:56:28
create a new type of duck for example this one00:56:30
we will rarely go there with red00:56:33
that's what it's called a head00:56:37
exactly00:56:40
So00:56:43
she can already begin to understand herself00:56:50
the spirit to inherit just like that yes00:56:53
it inherits itself like this00:56:57
or even if you think so and00:57:01
now just trying to come up with a better one00:57:03
the structure could even be done like this00:57:05
it even seems like an abstract eye to me00:57:07
somehow more00:57:09
more logical than simple00:57:12
exactly and00:57:14
create a regular class yes let's do it00:57:16
let's do then doct then to abstract and00:57:21
then I will already inherit you if so00:57:25
look then think about it I think it00:57:28
it will be quite enough00:57:31
we just have red hat duck and00:57:36
wolf immediately question flows down okay you00:57:39
want to create a new duck that00:57:41
for example, it implements flight in its own way00:57:47
place fly by her and we can use00:57:48
doha interface question what is it00:57:51
no no no you can if for example we00:57:54
we write in Java I would like to too00:57:56
come to attention that after all when you00:57:59
you use patterns and small differences00:58:01
depending on the language00:58:03
programming you use mod can00:58:05
be absolutely00:58:06
but for me personally this is just the same00:58:11
Can00:58:13
using in this case we for fly by00:58:16
he wears using new objects and00:58:20
here we have a countdown class like this00:58:25
how logical it is to guess here already00:58:29
exactly we begin we followed exactly and00:58:31
color yes, that is, if the class was inherited00:58:34
doc and and it’s logical that when we create00:58:36
the row of moves to us needs to be specified like this00:58:38
the duck will fly let's do it right away00:58:42
then let's move on, someone will start00:58:44
test from this00:58:45
let's go to Yandex dot php00:58:50
immediately give the spatki strekach00:58:53
interface00:58:56
interface which difference is responsible for00:58:59
flying00:59:01
life took00:59:07
then we immediately tighten the class that00:59:11
for example, the flight is different00:59:17
we have and00:59:21
then we can get it right away00:59:25
strategies like this. peppy, by the way, if anything00:59:28
I remind you if anyone has questions00:59:30
you can write, I’ll answer them, you’ll get them00:59:35
red hat00:59:38
only here are the folders00:59:44
.00:59:52
Let's then immediately create a new one00:59:54
the boat is like this before now the browser00:59:56
I'll see what we can do if00:59:59
error no no delivery screen01:00:02
well let's create it then01:00:05
red head duck01:00:09
long ago here immediately indicated from 5 doc and01:00:13
here we need to indicate what we want01:00:18
use01:00:20
that type is exactly the Russian chance01:00:24
bastard cops we can either through the construct01:00:26
indicate the type of flight, that is, what should01:00:29
used to fly01:00:32
or we must indicate01:00:34
exactly01:00:36
so to speak01:00:39
Well, through the Satra guitar function too01:00:42
option it didn’t just occur to me01:00:44
got a little distracted and01:00:46
let's do it here right away here I am01:00:48
created a new kodak object01:00:53
don't forget the comma here01:00:55
put and01:00:58
let's open it right away even after01:01:00
let's see what we got there01:01:02
nothing that unusual01:01:05
so there it is and I made it a ward01:01:10
look carefully we have01:01:11
here it turns out we have nonsense01:01:14
which inherited just the same01:01:17
clutches then we get what she has01:01:22
there is a flybe hey if only for this01:01:24
In this case, we did not indicate which class01:01:26
must be responsible for the flights of this duck01:01:30
micro from laptop just cloud yes I have it01:01:34
just how can it be on a mac01:01:36
pretty loud like that01:01:39
you'll hear exactly these loudly01:01:42
how do I write on the keyboard, well, in general01:01:44
now we need to determine exactly how01:01:46
this vodka will continue to fly01:01:48
call the fly function01:01:50
well here you can already guess about01:01:53
sense01:01:54
pattern strategy01:01:57
so now I'll return to the code yes01:02:01
this is where you see that we are here01:02:04
we determine what exactly should be01:02:06
in charge of the flight we are here01:02:07
we allow ourselves to modify exactly that01:02:10
how this or that duck should work01:02:13
this could be done even in01:02:14
class here yes for example in red hat doc01:02:18
but you made it possible01:02:20
do through construct01:02:23
what needs to be done here we want01:02:25
determine how it will fly to the show.01:02:28
I create but also01:02:31
Oh, by the way, the code I’m writing now01:02:34
you could even be transferred from dreams01:02:36
in this case, how much did I inherit?01:02:39
I decided let's do this01:02:41
fly with wings vodka for sale then to me01:02:44
you don't even need to create an effect like this01:02:46
Reminds me a little, by the way, because01:02:49
operators and in general that's what01:02:52
it turns out that we indicated exactly what01:02:55
a duck can fly with wings up let's01:02:58
Let's open the browser again and see what's on01:03:01
this time only I will show us the ward01:03:04
I'll reload the page here01:03:09
weaker opens ok ok I understand01:03:13
error01:03:14
it means we didn’t inherit it right away01:03:18
we can do this differently01:03:22
I can very often get confused simply with this01:03:25
these constructs01:03:28
so we can take it right away then01:03:31
then we'll make everything much simpler so that we don't01:03:34
we had to learn somehow and we’ll do something01:03:37
by encapsulation that we will have a function01:03:41
set you01:03:45
I also adhere to the principle here01:03:48
capsules what if we have examples01:03:52
which changes somehow is mine for01:03:55
working with it we do separate functions01:03:57
for example public functions and fly01:03:59
which allow you to set the value of this01:04:02
straight and end fly which allows01:04:04
cause cancellation if someone has now01:04:07
If you have any questions, please write to the chat and01:04:09
At once01:04:10
in this case let's do what01:04:13
when we create new designs guys01:04:15
ducks what have01:04:18
we get to call a dozen01:04:21
like01:04:23
because so red-headed duck01:04:25
for example, there we'll do it together01:04:29
will be able to fly using set fly01:04:32
[music]01:04:35
that is, and again it will just be01:04:40
Good you01:04:43
We can call this function later01:04:45
let me check the browser now01:04:47
she brings it down to now everything is correct01:04:50
I did everything right01:04:52
now I'll switch directly to the browser01:04:54
look how I said it, that is01:04:57
we already have a fly with wings class01:04:59
accordingly we can call and here01:05:01
now the fly function and01:05:04
and here are my customize and here01:05:06
this moment which concerned01:05:10
we could change01:05:12
peecher that is, what will answer01:05:15
for flying ducks01:05:17
here the names are dynamic change01:05:20
algorithm and don’t have to re-pisa01:05:23
rewrite the flight function01:05:25
himself01:05:27
dragon so we just replace it01:05:31
a class that describes some kind of01:05:34
flight for example there fly ds winx there01:05:36
fly with wings or fly wizard01:05:40
Winx for example I don’t know if it exists01:05:43
such nature but01:05:44
the facts are that in the case01:05:48
quantitative critical situation when01:05:50
we need to change what will happen01:05:52
you are simply responsible for the fly function01:05:55
replacing a class simply replacing a class01:05:57
which implements this function in its own way01:05:58
and this is a strategy, that is, of some kind01:06:02
I mean, that's the way it is, that's the strategy that01:06:04
we simply change it to the one we need01:06:06
to the story there is a faucet01:06:10
let's call it right away then01:06:15
Here01:06:16
fly function01:06:20
it should work one hundred percent because01:06:22
that mine was inherited precisely from the function01:06:25
yes yes and01:06:27
fly exactly the same here you are only01:06:30
we need to ask from fly this is already there and01:06:32
respectively01:06:35
now for red when to do this01:06:39
the flight function will be performed precisely01:06:41
cool Slavik let's move on right away01:06:44
the browser now that it has registered it and01:06:49
photo I'm opening the chest now01:06:54
if if when you download it will be simple01:06:56
flying with wings I'm any moment now01:06:59
I can change this to fly wizard winx01:07:02
let's do it right away that you just01:07:04
understood the essence of what the essence of Patorn is like01:07:07
changes exactly families of algorithms01:07:10
so okay let's say studio year for example01:07:13
I can immediately change the order here01:07:16
like a phoenix and01:07:20
at the same time, I will not experience any01:07:23
problems or something like that, that is01:07:26
I don't have to rewrite it myself01:07:29
function during there rarely if it01:07:32
existed because for this already01:07:33
answer a separate class and here01:07:36
same example of delegation delegation01:07:38
sorry what the01:07:41
one function is answered separately01:07:44
class this is not loading but I can’t01:07:46
fly and yes because I just changed01:07:49
there for another class which01:07:51
is already responsible for flight without wings and01:07:54
this is exactly how you can change01:07:57
itself the behavior of the algorithm itself01:08:01
we have for the implementation of one01:08:04
functions of an integer class like duck01:08:06
corresponds to a separate class class which01:08:09
there may be fly winx and so on01:08:11
which will inherit, for example, the interface01:08:14
fly that is, the flight interface with01:08:17
implementation of fly functions01:08:19
just really using this pattern01:08:23
change the implementation of some kind01:08:26
one function just changing trivially01:08:28
creating changing01:08:30
then which class should be responsible for01:08:33
this or that function and that’s not all of us01:08:35
only one function was given here01:08:37
add also quake let's do this01:08:38
We'll do it quickly if anyone has a question and01:08:41
let's immediately with 2 those therefore because01:08:43
this pattern strategy01:08:45
I hope we still have time to jump and01:08:48
factorial because I have little time01:08:50
I thought the director would quickly sort everything out01:08:53
pattern and very interesting and that's why it's so01:08:56
and even now you can create another01:08:59
like so01:09:00
I was talking about exactly croaking croaking01:09:05
So01:09:06
quack princess here we go now01:09:09
Let's quickly implement it there then01:09:12
For example01:09:14
ah fact high high tones there01:09:19
for example, the prize is some kind of duck duck01:09:21
club01:09:22
sit here right away cool01:09:25
How01:09:35
interface yes, that is, and here it is already01:09:38
its implementation is underway01:09:41
functions like those that ducks allow01:09:43
indicate how she wants for example there01:09:47
make sounds with cracks yes01:09:48
I imagined writing loudly01:09:55
here, for example, there will be a contribution on the board01:09:58
crack01:10:00
to that . quacks in low tones when01:10:03
by myself01:10:06
I don't know about the example01:10:10
there01:10:12
in the lower octaves that's what I wanted to say01:10:15
that is, despite the fact that this is this like this01:10:17
knows how and here we are too for Mickey Rourke01:10:19
the interface will also be its own01:10:23
implementation of nations clock and01:10:26
in this case we have to01:10:30
echo01:10:32
I'm kind of low01:10:36
super colors it's ready now let's01:10:41
let's go back to our class doc and how are you01:10:47
baxis function as01:10:51
up to 23 patterns is unlikely to be an aspen order01:10:54
Let's hang out for a day, that's of course the main thing01:10:56
just understand the essence and I will continue01:10:59
I’ll explain which ones are better to study tap dance01:11:02
it's good that everything is clear, thank you so much01:11:06
let's move on then and logically01:11:09
that is, we have a function01:11:10
quack we need to create a new one01:11:12
how to glue a hidden variable01:11:18
this is where we implement in our own way01:11:20
function as which will be called01:11:22
through the seeds, as it were, hair, that is01:11:25
variable which will be responsible for01:11:27
call classes which is different there01:11:29
bookmarks yes, here's what you think about varnish and what01:11:33
in the future we definitely need01:11:35
create because here we are01:11:36
we adhere to the principle01:11:38
they encapsulate this is what changes01:11:40
make do with the cave you indicated by the way01:11:42
It would also be possible through the constructor01:11:44
do01:11:45
which ones I went to initially and then01:11:47
changed my mind deprived via atari01:11:50
assigning a value to this variable01:11:51
we put it in too01:11:53
it's worth the next one to which we have01:11:56
will be called exactly01:11:58
function exactly how01:12:00
with this variable which we will pass01:12:03
let's connect everything right away01:12:06
other interfaces classes that we01:12:08
needed here01:12:10
until the important moment I would like01:12:13
notice that when you use01:12:15
pattern strategy gets you there01:12:18
such a situation that since classes01:12:22
is growing greatly because we have01:12:24
each class is responsible for some01:12:26
there is one function of some big01:12:28
class then a large one is created01:12:31
number of classes but in general it’s there01:12:33
normal and in a sense you are now01:12:35
you can see the composition because we01:12:37
let's assemble a doc class from some01:12:39
separate classes, that is, there01:12:42
quart but they are of course in their own way01:12:44
assigned but this is all01:12:46
vodka collects us from other classes01:12:49
we modify simple ones in our own way01:12:52
means we need to take this further01:12:55
this is no longer a planter face, this is a flag interface01:12:58
crack interface ask with frogs01:13:00
now he's confused01:13:02
what do we need to do with this right away?01:13:05
if you have interface quarks you need01:13:07
take a hack quack and be sure to connect01:13:12
so here to say it like this01:13:15
a large number of classes and is coming01:13:17
mark yes you realize perfectly well that01:13:20
after all, it was in vain that I said that there is no need for01:13:23
in this video in this kicked use01:13:25
space01:13:26
it would be much better with this01:13:29
ok great so I think I'm done01:13:32
connected so we needed01:13:34
run to red head01:13:37
and now our duck which01:13:41
there will be a red head01:13:43
cry on higher planes nude yes at least01:13:47
somehow there is now a quacking in this01:13:51
ducks will meet the grades and quick in01:13:53
in any case you can perform on01:13:55
any other class that01:13:56
implement yourself interface01:14:00
[ __ ] the interface and it will be in its own way01:14:03
implement this exact function immediately01:14:06
we can call this function let's go there01:14:09
for example from hit like this01:14:12
so let's move on right away01:14:14
Let's look at the browser now, by the way01:14:17
we will be back as presentations so that we01:14:19
could consider other patterns01:14:20
which we can consider01:14:22
reload the page and see if01:14:24
error yes we have of course an error01:14:26
because we couldn't and yes she didn't01:14:28
I could only open the quack interface01:14:31
we immediately return to the code then only01:14:36
I couldn't open this file yet01:14:40
interface to start something in terms of those01:14:42
spelled it wrong01:14:43
croak yes I already understood yes I don’t01:14:47
inattentive was here forgot there was a bunch01:14:49
c let's go here01:14:52
here immediately when I upload yet not found01:14:57
I’ll show you the interface right away01:15:01
I still have an error here, it's not here01:15:03
can find01:15:05
precisely the classes of varnish and quack themselves01:15:10
can not find01:15:11
our interface is like an interface with you01:15:14
submitting this too will now fix it means01:15:16
I missed something in the title somewhere01:15:18
more likely01:15:20
let's see this beginning in a quack01:15:22
interface01:15:25
like an interface and let's do it like this01:15:29
this is where my mistake was01:15:32
here just by giving the ad itself too01:15:34
I missed a letter here, that's it now01:15:37
definitely be working let's move on to01:15:39
let's see the node01:15:42
reboot and now everything works01:15:45
you flow01:15:49
just wanted to ask about namespace yes01:15:52
yes I agree absolutely agree as for01:15:55
such cases01:15:57
need to use on and spacex but I01:16:00
thought and considering space and but dear friends01:16:04
always use a namespace01:16:07
do as I do now, I will always do it01:16:10
program use we are here I decided01:16:12
without composer from a little freeloading and in01:16:15
In general, this is the situation, but01:16:17
remember use namespace01:16:19
overall good look what happened01:16:22
two functions perfectly volunteered for us and01:16:24
here is the meaning of strategy in any01:16:29
case we can modify the class01:16:32
class algorithms simply replacing it01:16:35
a variable that is responsible for some01:16:37
one function and in these variables01:16:39
classes are called that can01:16:41
I’m glad as hell to answer something in our case01:16:44
uses the class to fly uses01:16:46
class fly wizard frames and in order to01:16:50
quack she uses class haik quark01:16:53
crack and the point is that in01:16:56
in any case, we can do it without any problems01:16:58
You can replace these cool ones with others01:17:00
even now create others01:17:02
create other classes for them now01:17:04
let's get back to our presentation01:17:06
if something is unclear to someone exactly01:17:09
what concerned exactly01:17:13
pattern strategy please write now01:17:16
your questions in the chat and for now I01:17:19
back to our presentation01:17:25
so even here a little maybe somehow01:17:27
this is to expand, they'll just wait a second01:17:35
so that somehow it would be more in the center01:17:39
super wonderful01:17:43
ok let's go back to the factory then01:17:46
we have already discussed my method01:17:48
strategy reviewed01:17:50
so which slide do I need?01:17:53
Singleton and I think many have heard01:17:56
in this bo3 is not a singleton it is the simplest01:18:00
cartridge with one class and01:18:03
you can see all the logic right now01:18:05
on the screen they even say what’s his name01:18:09
I don't know if it makes sense01:18:11
please tell me show you how01:18:13
single panel works no or just01:18:15
explain if talks about put01:18:17
pluses in the chat but I'll explain how it is01:18:20
works01:18:21
although you say asked how and what01:18:23
explain and it’s not visible okay, which means01:18:25
look we have a class son groups01:18:27
loner is the absolute best01:18:30
a completely simple pattern that you can01:18:33
use which creates only 1101:18:37
only one global instance01:18:38
some specific class for everything01:18:41
applications and01:18:44
wear cool he has so many 101:18:46
private variable01:18:48
instance that is, which stores for itself01:18:51
an instance of some class only01:18:53
one copy which later01:18:54
used there is a function Friday here01:18:58
no constructor if anything01:19:01
is only used to01:19:03
call this particular instance, that is01:19:06
call this exact instance01:19:09
class and if it is not created then it01:19:12
is created and everything in case it is in any01:19:16
in case only one will be returned01:19:17
his visas to the beach and only to there01:19:19
instance you will always be01:19:21
use the app most often01:19:25
using then used then when01:19:27
need to make some kind of company01:19:29
there oil variables could someone like that01:19:31
they do it although I think everyone is fine01:19:34
we all know that for global01:19:36
there are many different variables01:19:38
ways you can use what gives01:19:39
php or what it now gives him for01:19:41
which you are studying01:19:44
best examples of application and according to01:19:46
let me show you better anyway01:19:48
We are not theorists here, we are their practitioners01:19:52
so let's switch to the neck and01:19:56
Dasha right away and I’m a little bit of a scumbag here01:19:59
before01:20:02
noon for all the mistakes like you01:20:04
got free, took the studio code and only01:20:07
I didn't notice now because I just01:20:09
broadcasts the cookie good then even01:20:14
for singleton we don't have to create01:20:16
a separate folder can be immediately01:20:18
Singleton herds. .01:20:20
but also see how to use the pattern01:20:23
loner is the simplest potter from whom01:20:26
Shouldn't it implement any at all?01:20:29
interface has only one class01:20:31
you know first of all what we create01:20:33
Here01:20:34
drive distance variables are the essence01:20:37
which is only to01:20:39
Just01:20:40
[ __ ] yourself just one copy01:20:43
class before, as I said, there is only one01:20:48
function although others can be written here01:20:50
but they are not needed, although they are not needed01:20:53
depends only on a01:20:54
someone is already writing just for you01:20:56
used but agree should too01:20:58
can be used for db here only01:21:01
there is only one function get instant01:21:03
which memory pairs memory like you already01:21:05
guessed it is used to01:21:07
return an instance of this class and if01:21:10
for example here01:21:12
authorities there01:21:15
they are there for example empty if we have01:21:17
wait, wait, these are the variables01:21:20
lenses an instance of a class of some kind01:21:22
for example then return there for example from01:21:27
let us have it here instance there01:21:29
equals now let's come up with it01:21:32
some class that we could here01:21:33
use01:21:35
for example for example for example01:21:40
Yes, you can save any other eye01:21:43
and you can either just do this one yourself01:21:46
many people do this most often, and01:21:49
here it will just look like he's here01:21:53
that's01:21:56
here you can even write some of your own01:21:58
functions01:21:59
we do this why take all this01:22:04
for I choose zai yes we have the same option01:22:08
here is the center if the variable01:22:10
essence emptiness nose it will be created logically01:22:14
then, for example, there is an example here01:22:17
of this same class if there is one01:22:20
this change is filled then be01:22:22
return only this one instance01:22:24
shield white 2 let's come then01:22:28
index.php tested everything, connect it01:22:31
this class or Dalton. stoves and01:22:34
let's create a new instance01:22:38
yes it would be possible even then but no01:22:41
static methods will not work here01:22:43
because when leave the static01:22:44
static methods they are already refuted01:22:46
know about creating new objects01:22:49
great then let's do it01:22:51
Singleton you are a loner and01:22:55
get01:23:00
let's first we did know you know01:23:02
Let's make a ward at the stage when ours is still01:23:07
from singleton class01:23:08
no, for example01:23:11
even your own copy01:23:17
here we drive a bartang singleton01:23:22
and what else can we do here?01:23:25
that's right, we can output them here from01:23:31
bodom all this, that is, we also look again01:23:33
when there was only one instance of the class01:23:36
created let's go to the browser01:23:38
let's see what happened if any01:23:40
errors01:23:42
ok I'm reloading the page01:23:45
what we see is recursion wow class01:23:48
Be right back . m at the rate01:23:51
Well, in general, look at the first one01:23:53
stage we do not have the only copy01:23:55
and then he creates himself, that is, this01:23:58
well it could be like01:24:00
Singleton can be instantiated01:24:02
himself that most often a bolt or01:24:05
create instances01:24:07
exactly01:24:08
some other class only one but01:24:11
most often he only creates himself and01:24:15
Yes, it’s logical that in this case after01:24:19
This is why we turn to him alone01:24:21
instance and this is precisely through01:24:25
instance01:24:26
I can even write an example now01:24:29
Let's imagine a function here01:24:31
I'll immediately switch to the code, super here I am01:24:36
for example I can01:24:38
goodbye Akiva features01:24:43
for example for example what yes it will be through01:24:46
instance about appeal here to be01:24:49
For example01:24:52
site for example01:24:56
here the game is an appeal to the ten calling this01:24:59
functions will be exactly through since the01:25:01
distance to01:25:04
help01:25:06
it actually smelled like sosaria01:25:09
A little01:25:10
got a little lost when that's why I didn't01:25:12
it would have worked just a bloody wolf and01:25:15
for example so that I01:25:19
just like that01:25:21
Here01:25:23
I'm twins twins up to the logical to run away01:25:26
instance I can even write here01:25:29
[music]01:25:32
coccyx for example one single object01:25:35
And01:25:36
call here already01:25:39
ate function01:25:41
In general, you can complicate this in your own way01:25:43
pattern01:25:44
get instant get in cis maybe01:25:49
static but I because what I know01:25:51
because I rarely benefit from society and01:25:53
static unless I'm sporting static01:25:56
methods there01:25:58
where exactly do I need to create no need01:26:01
create new objects where I don’t want to01:26:03
create a new class object01:26:05
in this case, I'm qualified in the cap01:26:08
I want to say that this won't work because01:26:10
that we are creating a new object here01:26:12
myself that is and01:26:14
even if you look at such examples01:26:18
you can search there, we can even go to01:26:20
It’s even better to consider refactoring there01:26:22
somehow there are a lot of treasure developers01:26:25
we'll look at the article on the atom later01:26:28
then this is exactly what will happen01:26:31
explanation01:26:32
decks the best explanation of how it all works01:26:35
will be so let's come that's why we01:26:37
we see where the class is halvat and for some reason01:26:40
I was taken aback by the rumor, I wonder why01:26:46
here it is01:26:48
instances of sleep in general, in the future everything01:26:52
operations can be carried out through01:26:55
this copy and01:26:58
access it via get there01:27:01
exactly ket just get instant01:27:05
in general there may be instances, that is, this01:27:08
there may be very different classes like me already01:27:10
I have said more than once and01:27:11
how much do we have and we still have half an hour damn01:27:14
you don't have time01:27:18
Then let me show you quickly01:27:21
really fast in 10 minutes one more01:27:24
a pattern called a prototype01:27:26
interesting about himself because he01:27:28
uses the magic function.01:27:31
so let's go back01:27:34
If anyone has any questions, write to the chat immediately01:27:37
I immediately see then I remove this and01:27:41
let's create a new folder for the pattern01:27:45
prototype01:27:46
prototype so let me do it too01:27:50
I will explain everything in practice like we do01:27:53
what is a prototype pattern?01:27:57
when we create we create new objects01:28:00
class based on what we clone01:28:03
some other object but not that one01:28:06
the way that we create a link to there01:28:09
you know, I'll give you a link to some01:28:11
certain back and what we01:28:12
use the magic function klo and in01:28:15
which we'll talk about if someone doesn't01:28:16
knows you can google it or I will now01:28:19
I’ll explain let’s imagine a situation like this01:28:22
we have figures and I have them here too01:28:25
shape this will be the interface, that is, which01:28:28
there the figure is determined and01:28:33
here is the whole interface and01:28:38
what in the end can one have01:28:43
For example01:28:48
the figure has some kind of name or01:28:51
there for example01:28:54
these I’ll think about what we have for example01:28:56
some figures, if for example I have01:28:59
circle then the circle has a radius and if I have01:29:01
a square already has an area01:29:04
let's talk a little about the message01:29:09
then in the end what's the matter with this?01:29:11
it turns out that01:29:14
then what will we have?01:29:17
figure01:29:18
it's even let's do it too no it's better not01:29:21
it is not necessary to do this with the interface01:29:23
interface I immediately want to say when we01:29:27
it is not necessary to use a prototype01:29:28
create an interface although it is also possible01:29:30
there is just a certain01:29:33
the figure we have is the figure that will be the name01:29:36
for example yes and color and others are all there01:29:40
parameters there there radius there width01:29:44
length and something else like that01:29:47
all this will be added additionally01:29:50
let's just say so clones and01:29:54
here is the exact moment when01:29:58
for example I have a neck here01:30:01
nice private here we have about01:30:03
these parameters are color, that is01:30:05
I have the name of the color here right away01:30:08
will be canceled in order to surrender the name01:30:11
figures01:30:13
We’ll just pass on the name of the figure01:30:15
Yes01:30:16
here equals let's take01:30:20
another public function which01:30:23
called a color set that would cost 2001:30:24
years01:30:26
but it can be done this way although I think01:30:30
you can do without this by asking them on01:30:34
generation stage, exactly the meaning of these01:30:37
two variables so that in fact and logically01:30:39
so let's better go to the very01:30:43
I don't know everything about the club's magic function01:30:46
Do they know about the existence of such a function?01:30:50
magical clone she just clones01:30:53
class object, that is, you specify how it is01:30:56
must be planned01:30:58
we plan to disappear died but exactly01:31:00
a new copy is planned01:31:02
I can use this class as an example01:31:06
make the wind tilt here she be01:31:09
clone the shade and01:31:11
what do I get as a result you are here01:31:14
from the neck I01:31:17
I take the shake and01:31:20
what can I do photo mode can I do01:31:24
For example01:31:26
clone yourself create a new one here01:31:28
a figure for example there just01:31:32
come on anyway, come on come on yeah01:31:35
let's all know what01:31:36
we are there so much01:31:39
he's who we do01:31:42
at least Alan give this a name01:31:45
we'll come back to everything later, in general it's a [ __ ]01:31:48
as I said, we will create with a01:31:52
for a snack abstract factory and without01:31:55
problems just let me sort it out01:31:57
now this and because through the01:31:59
fabric this is very interesting this is very01:32:02
cool but I'll explain later just there01:32:04
a few moments I just want more01:32:06
described heat let's quickly then01:32:08
sheksna and look how I spoke to01:32:11
using the pattern we create a prototype01:32:13
create new class objects based on01:32:16
cloning instances of classes then01:32:19
We immediately connect the prototype spike. php and01:32:24
It’s logical that if I, for example, want01:32:28
take plan even not even not01:32:32
You can definitely write a clone here01:32:34
you can celebrate here you can give and01:32:36
message to be displayed I cloned01:32:40
what will be output to begin with is simple01:32:43
Let's test everything and for example I want01:32:45
create for example from a triangle for example01:32:48
For this I clone to the shape class01:32:51
object of the neck class and I should now01:32:55
display page I cloned here01:32:58
so let's open local right away01:33:01
host01:33:03
reload the page here and how01:33:06
always a classic of the genre I forget01:33:08
I'm connecting it wrong somehow01:33:11
our classes01:33:13
so let's do it right away yes I wrote I01:33:16
forgot to write does not decrease01:33:19
let's add it here right away then01:33:21
nope, great, let's go back right away01:33:26
back01:33:27
browser and01:33:31
reboot01:33:35
cool shape on tv thanks01:33:37
again and did something wrong, that means01:33:40
again somewhere more carefully inattentively01:33:42
connected something somewhere01:33:45
login if vision studio code01:33:49
whispers close shave we have super01:33:52
wonderful and01:33:53
we should create a Shape family here01:33:57
something01:33:58
about that one, well, of course it’s wrong01:34:01
wrote to the toy play super as always01:34:04
let's go back then browse here01:34:07
everything will be okay now01:34:09
as we see nothing happens right away01:34:12
a logical question arises: why is this so?01:34:15
yes, let me read it, let me see I already wrote it there01:34:18
error maxim yes I already corrected it01:34:22
[music]01:34:23
then the question is why nothing happened01:34:27
even though we wrote a function here that is a clone of mine01:34:32
take advantage of logical magic01:34:34
the handball function is really nothing01:34:37
is happening01:34:40
because I was just writing here01:34:42
culture it was logical to write them I01:34:46
a little something at the end01:34:49
our pencil case has a little something already01:34:51
inattentive ok reboot yes01:34:53
now we have cloned01:34:55
there's an object up01:34:59
our figure with you, that is, we have01:35:01
some new figure now and what are we01:35:04
in the end maybe we can do it now01:35:05
let's create functions quickly then01:35:08
which I once said01:35:11
they’re different so I won’t add them later01:35:14
what is it there send me in a know 101:35:17
im going to use it to01:35:19
set a new name for01:35:22
the figures are here and we will transfer and01:35:25
also add chocolate shapes change01:35:30
halls01:35:33
Here01:35:35
it's full there01:35:38
encapsulation classic01:35:41
clan movie tricks on files like this01:35:45
owls see you mistake yes01:35:52
it’s so clever not to always return01:35:55
meaning exactly what I wanted to say01:35:56
What01:35:58
In general, due to default, he is already planning a new one01:36:01
running millet in some languages is also01:36:03
forget that you can do it in your own way01:36:05
realized there is a cycle of some I don't01:36:07
I know it's possible in some languages01:36:09
Running oriented programming01:36:10
maybe it’s something like this, for example, a clone01:36:15
I have to write myself to return it01:36:17
mileage but let's just shape then01:36:19
here we will write that we will have a simple name01:36:22
we will have01:36:25
set on him us it will be just ordinary01:36:29
some kind of strange figure01:36:36
for example, we will have red here and01:36:40
Let's imagine what we want to create01:36:42
some kind of triangle and01:36:44
this is why I'm here, what am I doing, I'm here01:36:47
for the first time with two barrels in the title01:36:50
set name01:36:54
triangle for example before and01:36:58
after that I can also set the color01:37:01
to our triangle to our club if01:37:03
that something cloned shake I for example01:37:11
super and that is01:37:13
then we can also create a square01:37:16
planned or triangle is it pure01:37:19
example, note Aziz, we are already cloning01:37:22
ready01:37:24
class object01:37:26
well, you can do any functionality01:37:29
pee the fact that we01:37:31
we create new objects based on01:37:35
based on one object already ready there01:37:38
which we will square the planets and01:37:43
for example it will have a color01:37:46
yellow01:37:48
give away orange01:37:53
now let's each of these or on01:37:59
display the object01:38:02
someone thinks will wonder why01:38:04
the project will survive but it’s just beautiful01:38:07
missed by the pilots01:38:10
we deduce to become first our figure then01:38:13
enter the clone with a figure that represents01:38:16
a triangle and01:38:19
also be sure to draw a square01:38:24
super a01:38:28
if you compare objects with cloned ones01:38:31
can be can be compared absolutely01:38:35
fully01:38:36
that is, in fact, when you plan01:38:39
you get no reference to the object itself and you01:38:41
you actually get a new nose object01:38:44
you know the cloned parameters and that’s it01:38:47
in that spirit01:38:51
you can just write and now I’ll answer who01:38:54
there to ask, let's do it now01:38:56
panda tower let's see if it works01:38:58
everything, yes yes of course we have01:39:02
the name variable is not set, let's do it right away01:39:05
let's come back here01:39:08
z-nat-ok01:39:13
we're coming back01:39:18
so she said that somewhere here is not01:39:20
it was he who set the change01:39:24
defined for because yes and men's line 15 is01:39:29
Freud in the Shape class01:39:31
15 lines of code I missed something again01:39:35
their01:39:39
explains, but to the point, well, kinda got it right01:39:42
that is01:39:43
discover publications01:39:48
so 2501:39:51
but for some reason everything is fine with the light01:39:54
only just in front of the ring she found me too01:39:58
somehow this and01:40:03
yes yes I see I know that I even have01:40:06
the girl was highlighting something there01:40:07
some errors yes now if01:40:09
for example, now I’ll come to the browser and I can already see it01:40:11
everything works for me here01:40:13
in the end we see you01:40:16
so I would like to immediately draw your attention01:40:19
what is it that we have two01:40:24
times and planned 2 set names01:40:29
Yes, yes, fine01:40:32
look we had two clonings we01:40:35
cloned shape twice for01:40:37
triangle for square see01:40:39
carefully what are these two clones?01:40:42
that's exactly what they are01:40:45
so to speak01:40:49
shape objects just originally had them01:40:53
these values are copied in itself but01:40:55
we eventually changed them and I see here01:40:58
that humana on the imbe I put orange01:41:01
his01:41:02
Yes, I obviously made a mistake somewhere01:41:05
something yes, I registered twice, we know01:41:08
I registered differently, we know I’ll change there01:41:11
below in line 15 the hen is now a thief01:41:14
everything will be fine but you can even01:41:16
now notice that here is an analogue of it01:41:19
cloning planned value01:41:21
exactly the original 1 copy in01:41:24
now countries are written in simple color and01:41:26
in general what is the point01:41:29
thank you sharp hurt sada according to so01:41:32
sit down, the Sishov chip is a getter and01:41:34
there is no such thing as a setter nickname, well, in general there01:41:38
what does it ultimately look like?01:41:41
the pattern is a prototype and in the end it01:41:44
represents that which is in how and01:41:46
said creates novus striking01:41:49
with a pattern you create new objects01:41:52
classes, clone one already01:41:54
copy and further modifying it01:41:56
using that is, that's the meaning of it01:41:58
let's now anyone have any questions01:42:01
write to the chat immediately and I will return to01:42:05
our presentation then01:42:07
so I’ll expand it from him01:42:11
kay01:42:16
super super super great01:42:19
ok then let me go a little now01:42:23
jumped over we've already looked at three01:42:25
we don’t have time to look at everything in a pattern01:42:28
using an example application using an example01:42:31
applications using what am I here01:42:34
I wanted to say exactly what01:42:37
you just saw01:42:40
you know most often patterns well you will01:42:44
see their names in the collections01:42:48
please write plus their children who already01:42:51
knows how to use some kind of framework01:42:53
if so that's just cool because all01:42:56
tidy outside as in general not in life01:42:58
it makes sense to use well invent01:43:00
some cat bikes you01:43:01
you program and what you generally wanted01:43:04
say that for example I tried it on01:43:08
for example, he stole the frame if you heard01:43:11
in this case during cooking, by the way, found in the discourse01:43:14
so they may have seen the tidy, but01:43:17
the essence is what there is such what01:43:21
what kind of things are in the mouth?01:43:24
marvel what is the repository class01:43:28
what is a class and repositories?01:43:31
go used their essence is01:43:34
that01:43:35
for example you can01:43:38
just take and does not directly contact01:43:42
model, namely through calls repositories01:43:44
this is an example this also exists01:43:47
potter01:43:48
someone will finish this already, super well done01:43:51
great for use in tidy01:43:53
because I'm now I think you01:43:55
you know what I'm getting at01:43:57
in general, often you very very often01:44:00
you meet exactly the pattern and01:44:02
design in the workshops and you yourself or01:44:04
you will use it even if there01:44:06
for example, you know that the tidy is running01:44:10
gives you the opportunity and I01:44:13
said that such a practice is very01:44:16
a broad topic that even today01:44:17
showed this is not enough01:44:19
constantly practice practice and01:44:21
even now I have already shown not but this01:44:23
snow on your table here if anyone01:44:28
I don’t understand something, I don’t contact you and01:44:30
I practice I practice but I can’t do without it01:44:32
it's obvious because you can comprehend01:44:35
exactly what the site concerns about patterns01:44:38
design is really needed all the time01:44:40
practice but also generally allowed to drink and01:44:42
it's always logical and01:44:46
[music]01:44:48
that I would like to ask you after01:44:50
how it ends01:44:52
then01:44:55
catalog of patterns that you need now01:44:57
I'll show you and practice on it too01:44:59
that is, just keep trying01:45:01
who wants to study01:45:04
you can even look for yourself01:45:06
relevant literature for example here01:45:09
this book, by the way, gives just the same01:45:11
also written by the gang 4-D gamma and01:45:15
so on but the plan, that is, I’m just leading01:45:20
who was what you always when here you even01:45:22
you can go to some right now01:45:24
the frame of the park scoreboard was torn01:45:26
applications look at the repository and01:45:28
take it apart and you will understand that you too01:45:30
separate pattern01:45:33
so the shameful catalog is their use of course01:45:36
how could he say that without them?01:45:39
when we want to find some new ones01:45:41
patterns for01:45:44
solving some problem or simple ones01:45:46
teachers just find a path for01:45:49
to study we use the Potter's catalog01:45:51
what is a catalog pattern exactly?01:45:55
the thing is to keep a whole list for yourself01:45:57
patterns that we can use01:46:00
here is a complete description of the example and so on01:46:03
the coolest by the way which patterns with01:46:05
which many developers know it from01:46:07
which you can’t argue with is refactoring01:46:09
kuru. Well, refactoring. guru01:46:12
at least one lot of information like here I am01:46:15
written can be found on Wikipedia books01:46:18
for example, even this one is some01:46:19
written by the guys who put it here01:46:22
I’m even watching this whole culture here01:46:24
here, of course, using the example of Jami Java01:46:28
create one here, I’ll find some01:46:30
example01:46:34
Here's an example of using a pattern01:46:37
adapter relationship is described here01:46:39
the results are very detailed01:46:42
so let's move the browser now01:46:44
I will now show the paradise factors to the guru.01:46:47
refactoring. this site because01:46:51
you should definitely know it and01:46:53
today after the webinar I will definitely01:46:55
I recommend going to it on the left01:46:57
practice something watch01:47:00
and now I’ll switch to ours01:47:03
browser01:47:05
so just a second01:47:12
super01:47:14
here is the refactoring. hello world guru01:47:17
hi this is the best site I think01:47:21
patterns that exist and them01:47:23
Everyone uses 3 all the time01:47:25
factoring is also covered a lot01:47:27
we'll talk about factoring too, but you01:47:29
you can for example go here here you01:47:30
you can just study and look into01:47:34
boilers and what you see here here01:47:37
it's just that absolutely everyone fell like me01:47:40
said what to study their practical01:47:42
use but not at one time01:47:44
need to constantly practice01:47:46
used today we looked here01:47:48
this pattern this pattern this one01:47:50
pattern and of course we looked01:47:52
strategy that is four wow patterns01:47:54
cool and you see we don’t even have time01:47:57
let's take a look at everything01:47:58
An example of an abstract factory pattern is here01:48:01
just perfect everything is written simply01:48:05
there are great examples of herd quarrels01:48:09
a little blink but you see it here too01:48:12
common interface for all chairs01:48:15
There is01:48:17
what is the point01:48:19
abstract factory pattern here01:48:22
the structure has already been described01:48:24
food here by the way dependency injection01:48:27
used see all these classes01:48:29
depends on the interface and01:48:34
I 2 yes yes yes yes yes yes I agree that it is01:48:38
more than a directory of all developers by this01:48:41
enjoy it and I'm just saying now01:48:42
so that others call everyone01:48:44
used in general see what01:48:48
the essence is precisely the abstract background01:48:51
factory if we don't make it in time, well01:48:53
unfortunately it’s almost straight forward01:48:55
but at least I’ll explain it this way here01:48:58
upstrac interface factors to have01:49:02
itself functions to create a product and create01:49:04
product which in total01:49:08
return new class objects there01:49:11
some products that01:49:13
accordingly, there is also its own01:49:14
interface there products and products and01:49:16
for example we have a factory here which01:49:19
will create a product in its own way and01:49:22
product b and here on in its own way01:49:24
created and creates its own versions of the product01:49:26
b and product that is when we have01:49:29
abstract factory we create our own01:49:31
factories as I said because when01:49:34
we created using the factory method01:49:36
we had one factory, I also had01:49:39
pretty well01:49:40
a simple option in something in some way01:49:43
sense01:49:44
factories but it’s understandable, it’s also normal and01:49:48
Here we have, for example, another account01:49:50
the factory we are creating which01:49:53
implement yourself interface track01:49:54
figures and she creates these in her own way01:49:56
two products we have01:49:59
implement yourself already interface and01:50:01
about the cocktail product b&b forgive me and you01:50:05
even here you can see that everything01:50:07
I think I’ll notice that these are all01:50:09
functions should return you exactly01:50:11
so that all products are of these types then01:50:13
there is if it just makes sense01:50:16
abstract factory is what we create01:50:18
create a separate family of classes01:50:21
which create for us separate01:50:23
families of some objects that's what01:50:25
the meaning of this particular pattern and I01:50:30
I definitely recommend it to everyone01:50:33
look at this site look here01:50:35
there are also a lot of useful things01:50:37
here are just amazing code examples01:50:42
here is also an interface that has its own01:50:45
indicate here to create a button or there01:50:48
checkbox for example here for windows01:50:51
factory like GUI and it01:50:54
Windows creates a button there in its own way01:50:57
and a Windows checkbox and on the chair it’s01:50:59
us macbook tu-tum act mac os with like y01:51:03
for example, here he is already in his own way01:51:05
recreate the magic button and magic checkbox then01:51:07
there are their own factories being created here01:51:08
who create their products here already01:51:11
in the future it will be created by itself01:51:12
offer arrived application but in this01:51:14
purely as an example, does anyone have any questions?01:51:17
write too, I will constantly remind you01:51:20
even when the broadcast is over01:51:24
well, in general, if you look at it like that, then01:51:28
it turns out that all the benefit is precisely01:51:33
patterns in the gift catalog01:51:36
is that there is always any01:51:38
an incomprehensible situation if you don't do something01:51:40
you understand by similar ones you run in cauldrons01:51:44
pattern and look there for examples and01:51:45
you study something that is even the same as me01:51:48
showed but it's not enough for us01:51:51
there's simply not enough time to01:51:52
consider how many examples we want01:51:54
And01:51:55
that is, I recommend it to everyone after01:51:58
this binary look exactly the same at01:52:01
This resource besides this one is also useful01:52:04
will you01:52:05
that is, this is the meaning of the catalog01:52:08
like this too let's say like this01:52:09
sources that will be very useful01:52:13
I never dreamed of respect, thank you too01:52:18
not everyone listens to this band, oh well01:52:21
well, it’s overgrown with bar factoring and what in general01:52:25
I wanted to say that01:52:27
[music]01:52:29
concerns refactoring specifically because01:52:32
Well, I think many have already guessed that01:52:35
refactoring can be said very strongly01:52:38
closely mated using potter01:52:41
because in the end these are the results of this01:52:45
reel almost01:52:48
I’ll make it up myself and guess what01:52:51
there are patterns everywhere if they pay attention01:52:54
architecture then accordingly they can be01:52:56
use when factoring because01:52:59
that when, for example, someone comes towards us01:53:00
terrible spaghetti code and by the way in the package01:53:04
code is antipater01:53:06
thanks for the binary, thanks too, well, I’m almost there01:53:09
already finished the catalog fire yes I agree01:53:12
so I just want to say that01:53:16
when we have, for example, all some01:53:18
spaghetti code and dad anti patterns too01:53:22
I recommend looking at it a little01:53:24
today webinar about patterns01:53:26
designing not antipodes is 5 701:53:29
says but01:53:31
design patterns are very cool01:53:34
can be used for factoring01:53:36
I just recommend any type of food01:53:38
the eye is the same when you need to break01:53:40
some structure if you see that you01:53:42
somewhere you can during factoring01:53:44
use it or for some reason just01:53:46
tasks to take advantage of some good01:53:49
the pattern will go bad, that’s okay, by the way01:53:52
they also want to say it’s not always necessary01:53:54
use a factor passport where you are01:53:56
you'll find it, you'll see that it's possible01:53:58
use and well, depending on the type01:54:00
and you can even do work between them01:54:03
in general01:54:06
thank you all too, they finish it more often01:54:10
there is and let's sum it up I'm here01:54:13
what I even just said and then01:54:15
there is in the end01:54:17
that yes, that is, it turns out that exactly01:54:22
patterns and this is someone that allows you01:54:25
strongly solve the problems you have01:54:27
arises that is, if you see this01:54:31
architectural task that's how01:54:33
for example, we had fishing rods, that is, we01:54:35
we could do everything there01:54:37
some, for example, are easy to do01:54:40
instead of just asking01:54:42
object we made a clear flexible01:54:44
architecture where we simply replace the class01:54:46
which is now for some one function01:54:48
which is very cool and01:54:50
when factoring, also use a pattern01:54:53
it is everywhere and sports nerd where it is01:54:55
appropriate because you don’t need everything dry01:54:57
tour arrange partner admire 401:54:59
I’ll tell you one last minute and01:55:02
find visible by the way, also video courses on01:55:05
specialty picks 2pir if available01:55:07
design patterns individual01:55:09
some kind of strong course I hope he01:55:10
will definitely look at the stove01:55:13
the developer here is just a bunch of spokes exactly01:55:16
in courses on this topic just you01:55:17
video courses available from the test and01:55:20
so for everyone who wants to upgrade01:55:22
skill and developer also check out01:55:25
the course catalog can be found here01:55:27
specialties our webinars are also available here01:55:30
I think we’ll still do 101:55:33
and in general there are a lot of courses here and that01:55:36
that it can be useful and also use01:55:39
test provider if you use these01:55:41
video on active there is one of these features01:55:44
girls are cool and helpful01:55:46
specializations so you can check01:55:48
how much did you understand the information?01:55:51
on the right or in the service that shows01:55:52
you should test it all so01:55:55
I definitely recommend checking it out01:55:57
specialization stove developer and01:55:59
something thank you all thank you all for01:56:03
attended this webinar01:56:05
thank you who supported I see you01:56:08
I liked it very much and I still01:56:10
I will most likely be one hundred percent01:56:13
I also really like to hold a webinar today01:56:15
really very very fast ward01:56:18
time flew by I even thought that we01:56:20
somehow we'll see faster but so01:56:23
it turned out that I was very carried away and in01:56:26
in general I got that there was something01:56:28
educational portal intelligent topics01:56:30
who is interested in looking at01:56:32
specialization pita oven much more01:56:34
useful courses and there will be more binaries01:56:35
so thank you all, use it01:56:38
pattern and teach them now right now01:56:40
take a look at refactoring gurus at01:56:43
try to do something on your own and in general01:56:47
then useDescription:
🔥Промокод на скидку 15% на все курсы ITVDN - 4YOUTUBE Материалы вебинара - https://itvdn.com/ru/webinars/description/design-patterns-for-beginners-php Начинающие разработчики редко задумываются о построении структуры в приложении, и это негативно отражается на качестве кода. Мне часто приходилось видеть "спагетти-код" написанный не очень опытными разработчиками. Дальнейшая разработка с использованием такого кода доставляем массу неудобств и сложностей, которых можно было бы избежать в случае правильного изначального проектирования. Если хочешь писать ещё больше качественный код, убрать дублирование, сделать код больше понятным для других разработчиков - тогда изучение паттернов проектирования тебе очень поможет. Спикер — Демьян Костельный, Middle PHP Developer План вебинара: - Знакомство. Введение. - Паттерны, кто их вообще придумал? - Почему паттерны всюду используют, их преимущества. - Порождающее паттерны. - Использование на примере приложений - Каталоги паттернов и их польза. - Пару слов о рефакторинге кода. - Итоги
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