javascript - 如何赋予数组中的对象属性？

Question

例如，我正在创建一个对象数组，该数组中的每个对象都应该描述一本书。

在我的脑海中，这就是我所看到的:

var booksArray = ["Always Running", "Hatchet", "Autobiography of Malcolm X", "Che Guevara: A Revolutionary Life", "The Prince"];

我还应该提供以下属性:

标题: 作者: 已读:( bool 值)

所以..话虽如此，这就是我的代码的样子，我不知道我的做法是否正确，看看 book1、book2 等如何没有连接到数组。

    var booksListArray = ["Always Running", "Hatchet", "Autobiography of Malcolm X", "Che Guevara: A Revolutionary Life", "The Prince"];

    var book1 = {
        title: "Always Running",
        author: "Luis J. Rodriguez",
        alreadyRead: true
    }

    var boook2 = {
        tite: "Hatchet",
        author: "Gary Paulsen",
        alreadyRead: true
    }

Answer 1

您可以将 book 对象直接放入数组中:

var books = [
    { title: "Always Running", author: "Luis J. Rodriguez", alreadyRead: true },
    { title: "Hatchet", author: "Gary Paulsen", alreadyRead: true },
    // etc
];

请注意，当您进行扩展时(例如，拥有数十万个 Book 对象实例)，如果您使用构造函数，则 JavaScript 引擎可以针对具有相同属性的许多对象优化其内部内存(例如，通过不存储例如，每个对象实例的属性名称):

function Book(title, author, alreadyRead) {
    this.title = title;
    this.author = author;
    this.alreadyRead = alreadyRead;
}

你会像这样使用它:

var books = [
    new Book( "Always Running", "Luis J. Rodriguez", true ),
    new Book( "Hatchet", "Gary Paulsen", true ),
    // etc
];