Hi , iam confused about the term (composition ) in

Question

Hi , iam confused about the term (composition ) in

oop in js . is there any difference between to implementing it through the (function returns object way - i belive it called factory function right ?) or using class for implementing it ? like this :

class Publisher {
constructor(name, location) {
this.name = name;
this.location = location;
}
}

class Author {
constructor(name, booksWritten) {
this.name = name;
this.booksWritten = booksWritten;
}
}

class Book {
constructor(title, genre) {
this.title = title;
this.genre = genre;
this.publisher = new Publisher("Sample Publisher", "Somewhere");
this.author = new Author("Sample Author", 5);
}
}

0

16.10.2023

7 ответов

14 просмотров

mj Автор вопроса

Thomas
Show the other way

https://youtu.be/dYHWvUVMnCU

0

16.10.2023

mj Автор вопроса

mj
https://youtu.be/dYHWvUVMnCU

the other way you asked for

0

16.10.2023

David

In your Book class if you accept Publisher and Author in the constructor, that's composition. You have them hard coded in the constructor. That's not composition

0

17.10.2023

mj Автор вопроса

you mean as parameters like this ? class Book { constructor(title, genre) { this.title = title; this.genre = genre; this.publisher = new Publisher("Sample Publisher", "Somewhere"); this.author = new Author("Sample Author", 5); } }

0

17.10.2023

David

mj
you mean as parameters like this ? class Book {...

no class Book { constructor(title, genre, publisher, author) { this.title = title; this.genre = genre; this.publisher = publisher; this.author = author; } }

0

17.10.2023

mj Автор вопроса

David
no class Book { constructor(title, genre, publi...

how to multi inherit in js

0

17.10.2023

Thomas · Accepted Answer

Thomas

Show the other way

0

16.10.2023

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Hi , iam confused about the term (composition ) in

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