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csharp

00:00:02

loftblog channel,

00:00:03

my name is give today we will talk about

00:00:05

fundamental techniques of op. there

00:00:07

are three of them in total inheritance

00:00:10

encapsulation and polymorphism inheritance

00:00:13

is a mechanism that allows you to use

00:00:15

the functionality of the parent class in a sensor let's

00:00:18

look at a simple example let's assume you

00:00:21

are making a game in which there are different

00:00:24

characters say urc and a dragon an orc must

00:00:27

be able to walk, jump and run a dragon

00:00:30

must also be able to walk, jump and

00:00:32

run but In addition, he must also be

00:00:35

able to fly. If we do not

00:00:37

use the inheritance mechanism, then

00:00:39

we will have to write three identical

00:00:42

functions in each character class. In the

00:00:45

case of inheritance, we can create a

00:00:47

base class and

00:00:48

write in it the abilities inherent in

00:00:51

both characters; in this case, running,

00:00:54

jumping and walking, and in in child classes,

00:00:57

indicate only the individual

00:00:59

abilities of each dragon, this

00:01:01

ability to fly, but the orc

00:01:04

does not have them at all, thanks to this it will become less and

00:01:07

much simpler in our case, the difference

00:01:10

is small, but if you

00:01:12

need to create not two but 20 such characters,

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inheritance will

00:01:16

significantly simplify the work and if more than 20

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for example 200 then this is generally simply

00:01:23

necessary in order to avoid

00:01:25

incredible confusion the next principle

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is encapsulation this principle

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allows you to limit the access of some

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program components to others and

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this is necessary in principle also in order to

00:01:38

avoid confusion this

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principle is implemented using

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special access modifiers for

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all of them there are four public

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internal protected and ruled by public this is a

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completely open access modifier, a

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component marked with this

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modifier will be available

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anywhere in the program; moreover, it will be

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available even outside of it in other

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assemblies and programs internal this is a

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partially closed modifier; components

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marked with this modifier will be accessible only inside the

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data program

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protector is, say, a partially

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open access modifier;

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components with this modifier will be

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available only in the class where

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they were declared, and in the children of this

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class, and finally, the most closed

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modifier will reveal its owner; they

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will be available only in the class where

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they were declared.

00:02:35

Now let's look at the third and last

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fundamental principle of

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object-oriented

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programming - this is polymorphism,

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the word polymorphism itself is of Greek

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origin and is literally translated as a

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variety of forms, and I must say this

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translation largely reflects the real

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use of this principle in simple

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words, polymorphism is the ability of

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functions to process different types of

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arguments for this principle there are

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several types, the most different

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from each other is parametric

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polymorphism and this is a hook polymorphism

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parametric polymorphism

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involves executing the

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same block of code for different types of

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arguments

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and this is a hook polymorphism for each type of

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argument executes different blocks of code well that’s

00:03:24

all for today we are in general Basically,

00:03:26

we got acquainted with the fundamental

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principles of object-oriented

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programming in the following lessons we will

00:03:32

analyze each principle in detail,

00:03:34

we will separately talk about various nuances and

00:03:37

analyze in practice programs

00:03:39

that use these principles you watched the

00:03:42

course on the basics of sysharp on the loftblog channel

00:03:44

my name is Dani see you again

Description:

Пройди БЕСПЛАТНО профориентацию в IT - https://loftschool.com/free/career/ Введение в основные принципы объектно ориентированного программирование: Наследование, Инкапсуляцию и Полиморфизм. Полезные ссылки: Скачать Visual Studio - https://visualstudio.microsoft.com/downloads/ Канал автора - https://www.youtube.com/channel/UCZO9yIj-TTkJuUkpiSbxo6w Не ограничивай себя видеоуроками на YouTube! Узнавайте еще больше полезной информации! Общайтесь с опытными разработчиками, преподавателями и развивайся через личное общение! Школа онлайн-образования: https://loftschool.com/ Telegram: https://telegram.me/loftblog Slack: http://slack.loftblog.ru/ Сайт: https://loftschool.com/ Instagram: https://www.facebook.com/unsupportedbrowser Группа вконтакте: http://vk.com/loftblog Facebook: https://www.facebook.com/unsupportedbrowser Twitter: http://twitter.com/loft_blog Больше уроков от lofblog: #loftblog Все уроки по хештегу: #loftblogCSharp Полезные уроки для веб-программиста: ----------------------------------------------------------------------------------- Не забываем, что самый лучший способ сказать "спасибо" - нажать кнопку "нравится" и скинуть ссылку на урок друзьям. Ничто другое так сильно не мотивирует автора продолжать работу :)

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