Question

说我希望对象是这样的：

var Book = {
        title: "the catcher in the rye",
        price: "80.98",
        characters: [{name: "holden caulfield", age: 16, height:"6.2"},
                     {name: "phoebe caulfield",age:13, height: "5"}] 
     };

EDITED

问题： characters数组是通过逐个添加一个字符来构建的。如何确保名称，年龄和身高属性的定义如上所述。

有什么效果？

Book.characters.add({name: "phoebe caulfield",age:13, height: "5"});

我希望能够以编程方式定义它，即向对象添加属性，而不是像这样定义它。

这可能吗？

Answer 1

你可以在动态代码（而不是静态声明）中这样做：

var Book = {};

Book.title = "the catcher in the rye";
Book.price = "80.98";
Book.characters = [];
Book.characters.push({name: "holden caulfield", age: 16, height: "6.2"});
Book.characters.push({name: "phoebe caulfield", age: 13, height: "5"});

Answer 2

你的意思是这样吗？

var Book = {}; // empty object

Book.title = "the catcher in the rye";
Book.price = 80.98;
Book.characters = [];

var character = {
    "name": "holden caulfield",
    "age": 16,
    "height": 6.2
};

Book.characters.push(character);

Answer 3

var Book={};
Book.title="the catcher in the rye";
Book.price="80.98";
var characters=[];
characters.push({name: "holden caulfield", age: 16, height:"6.2"});
characters.push({name: "phoebe caulfield",age:13, height: "5"});
Book.characters=characters;

...等

Answer 4

当然是！ Javascript是一种完全动态的语言 - 如果你想要一个对象的新属性，只需设置它！

e.g。

var myObject = {}; // empty object
myObject.myProperty = 5; // creates the new property and sets it to 5.
myObject.nestedObject = { prop1: 6, 'long-property-name': 'lolcats' };

Answer 5

我认为你正在寻找一个JSON字符串： http://www.json.org/js.html

这将允许您创建对象：

var myobj = {  };
myobj.myprop = "value";
alert(JSON.stringify(myobj));

Answer 6

使用map函数是我发现构建对象数组的最简单方法。下面的代码片段仅用2条语句即可构建所需的对象：

var Book  = {
  title: "the catcher in the rye",
  price: 80.98
};

Book.characters = [6.2, 5].map(el => {
  return {
    name: 'caulfield', age: 14, height: el
  };
});



// Output
JSON.stringify(Book);
{
   "title": "the catcher in the rye",
   "price": 80.98,
   "characters": [
     { "name":"caulfield", "age":14, "height":6.2 }, 
     { "name":"caulfield", "age":14, "height":5 }
   ]
 }

以编程方式构造对象数组

6 个答案: