javascript对象与数组对比JSON [英] javascript objects vs arrays vs JSON

问题描述

尽管有大量的谷歌搜索和拉扯，我不能为我的生活阐明json，对象和数组（在javascript中）之间的区别。下面是我如何使用二维数据容器（害怕在这里使用数组，对象或json）。请告诉我这两个例子是什么？

Despite much googling and hair-pulling, I can't for the life of me articulate the difference between json, objects, and arrays (in javascript). Below is how I've been using 2-dimensional data containers (afraid to use the words "array," "object," or "json" here). Please tell me what these two examples are?

//first example:
[
    {"record_id":1,"name":"Frank"},
    {"record_id":2,"name":"Sally"}
]

//second example:
{
"countries": 
    [
    {"id":1,"name":"Canada"},
    {"id":2,"name":"Mexico"}
    ],
"states":
    [
    "id":1,"name":"Maine"},
    {"id":2,"name":"Alaska"}
    ]
}

推荐答案

JSON是数据结构的表示，它不是对象或数组。

JSON is a representation of the data structure, it's not an object or an array.

[1,2,3]

是一个数组。

{"foo":"bar"}

是一个对象。

在你的例子中，

[
  {"record_id":1,"name":"Frank"},
  {"record_id":2,"name":"Sally"}
]

是一个对象数组。

{
  "countries": 
    [
      {"id":1,"name":"Canada"},
      {"id":2,"name":"Mexico"}
    ],
  "states":
    [
      {"id":1,"name":"Maine"},
      {"id":2,"name":"Alaska"}
    ]
}

是否包含一个对象其中的其他数组和对象。

Is an object containing other arrays and objects inside of it.

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