jQuery .each()数组中的.each()数组

Question

听到一个对象数组

 advancedParams = [];
 advancedParams["cost"] = [];
 advancedParams["cost"]["from"] = 10;
 advancedParams["cost"]["to"] = 100;

但是.each()没有看到第二个数组

 $.each(advancedParams, function( idx, obj ) {
     console.log(idx); // shows cost
     console.log(obj ); // shows [from: "10", to: "200"]
     $.each(obj, function( key, value ) {
         console.log(key); // nothing
         //each have no iterations, why?
     });
 }

Answer 1

这是绝对无效的：

{cost: [from: "10"], [to: "200"]}

因为在数组中，不能用:分隔值。

与其声明数组[]，不如分配一个对象。

advancedParams = {};
advancedParams["cost"] = {};

在下面的演示中签入。

​

var advancedParams = {};
advancedParams["cost"] = {};
advancedParams["cost"]["from"] = 10;
advancedParams["cost"]["to"] = 100;

$.each(advancedParams, function(i, obj) {
  console.log(obj); // results in "Object {from: 10, to: 100}"
  $.each(obj, function(i, item) {
    console.log(item); // results in "10, 100"
  });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

​

Answer 2

您的对象定义是无效的。请查看下面的错误消息：

​

​

将其存储在这样一个对象中：var obj = { from: 10, to:200}。或者，如果您想要一个对象数组，可以这样做：var arr =[{from:10,to:200},{from:1, to:300}]。