如何使用类语法将新书对象推入空数阵列中？

发布于 2025-01-20 01:14:29 字数 643 浏览 2 评论 0原文

如果类声明中的构造函数已经创建了一个书对象，如果我正确地考虑了这一点，我需要做的就是实例化该对象，然后将该对象推入数组中。我在这里缺少什么？

class Book{
  constructor(title, author, pages, hasRead, library=[]){
    this.title = title
    this.author = author
    this.pages = pages
    this.hasRead = hasRead
    this.library = library
  }

  
addBookToLibrary(){
   return this.library.push();
 }
}

//instantiate Book Object
let newBook = new Book();

//push the object into the empty array??
newBook.addBookToLibrary("A book", "Charlie Morton", "500", true);


console.log(newBook.library);

原文

If a constructor in the class declaration already creates a book object, If i'm thinking about this correctly, all I would need to do is instantiate the object, then push that object into an array. What am I missing here?

class Book{
  constructor(title, author, pages, hasRead, library=[]){
    this.title = title
    this.author = author
    this.pages = pages
    this.hasRead = hasRead
    this.library = library
  }

  
addBookToLibrary(){
   return this.library.push();
 }
}

//instantiate Book Object
let newBook = new Book();

//push the object into the empty array??
newBook.addBookToLibrary("A book", "Charlie Morton", "500", true);


console.log(newBook.library);

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伤感在游骋 2025-01-27 01:14:29

如前所述，最初您没有将任何参数传递给推送方法。如果您想创建一系列数组，例如：

[
[
“书”，
“查理·莫顿”，
“ 500”，
真的
]，，
[
“两本书”，
“查理·莫顿”，
“ 200”，
错误的
这是给
]

尽管我认为具有键的一系列对象：值配对将使使用量更易于使用。

class Book{
  constructor(title, author, pages, hasRead, library=[]){
    this.title = title
    this.author = author
    this.pages = pages
    this.hasRead = hasRead
    this.library = library
  }
  
  addBookToLibrary(book){
     return this.library.push(book);
  }
}

//instantiate Book Object
const newBook = new Book();


//push the object into the empty array??
newBook.addBookToLibrary(["A book", "Charlie Morton", "500", true]);
newBook.addBookToLibrary(["Two book", "Charlie Morton", "200", false]);


console.log(newBook.library);

As stated, originally you were not passing any arguments to your push method. If you are looking to create an array of arrays like:

[
[
"A book",
"Charlie Morton",
"500",
true
],
[
"Two book",
"Charlie Morton",
"200",
false
]
]

Though I think an array of objects with key:value pairing would make it easier to use.

class Book{
  constructor(title, author, pages, hasRead, library=[]){
    this.title = title
    this.author = author
    this.pages = pages
    this.hasRead = hasRead
    this.library = library
  }
  
  addBookToLibrary(book){
     return this.library.push(book);
  }
}

//instantiate Book Object
const newBook = new Book();


//push the object into the empty array??
newBook.addBookToLibrary(["A book", "Charlie Morton", "500", true]);
newBook.addBookToLibrary(["Two book", "Charlie Morton", "200", false]);


console.log(newBook.library);

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