JSON对象数组

Question

早上好,

我是JSON的新手,我正在尝试使用JSON而不是某些二维数组重新实现页面.

我希望完成的是获取一系列对象.对象看起来像这样:

{ // Restaurant
  "location" : "123 Road Dr",
  "city_state" : "MyCity ST",
  "phone" : "555-555-5555",
  "distance" : "0"
}

我想创建这些餐馆对象的数组,并用一些逻辑填充距离字段,然后根据距离字段对数组进行排序.

我对JSON很新.我可以创建一个JSON对象数组,还是有其他JSON实现这个目标？

非常感谢您的帮助.

凯文

Answer 1

你当然可以。它看起来像这样：

{ "restaurants": [ 
    { "location" : "123 Road Dr", "city_state" : "MyCity ST", "phone" : "555-555-5555", "distance" : "0" } , 
    { "location" : "456 Fake St", "city_state" : "MyCity ST", "phone" : "555-123-1212", "distance" : "0" } 
] }

“restaurants”的外部字段名称当然不是必需的，但如果您在传输的数据中包含其他信息，它可能会有所帮助。

Answer 2

// You can declare restaurants as an array of restaurant objects
restaurants = 
[
    {
        "location" : "123 Road Dr", 
        "city_state" : "MyCity ST", 
        "phone" : "555-555-5555", 
        "distance" : "1" 
    },
    {
        "location" : "456 Avenue Crt", 
        "city_state" : "MyTown AL", 
        "phone" : "555-867-5309", 
        "distance" : "0" 
    }
];

// Then operate on them with a for loop as such
for (var i = 0; i< restaurants.length; i++) {
    restaurants[i].distance = restaurants[i].distance; // Or some other logic.
}

// Finally you can sort them using an anonymous function like this
restaurants.sort(function(a,b) { return a.distance - b.distance; });

Answer 3

首先,这根本不是JSON,你只是使用Javascript对象.JSON是用于表示对象的文本格式,没有"JSON对象"这样的东西.

您可以为对象创建构造函数,如下所示:

function Restaurant(location, city_state, phone, distance) {
  this.location = location;
  this.city_state = city_state;
  this.phone = phone;
  // here you can add some logic for the distance field, if you like:
  this.distance = distance;
}

// create an array restaurants
var restaurants = [];
// add objects to the array
restaurants.push(new Restaurant("123 Road Dr", "MyCity ST", "555-555-5555", 0));
restaurants.push(new Restaurant("123 Road Dr", "MyCity ST", "555-555-5555", 0));
restaurants.push(new Restaurant("123 Road Dr", "MyCity ST", "555-555-5555", 0));