JSON.stringify（array）返回[]

Question

I'm trying to stringify multiple arrays, but unsuccessfully

var arr=new Array();
arr['do']='smth';
arr['asd']=[];
arr['asd']['dsa']='alo';
var string=JSON.stringify(arr)
console.log(arr);
console.log(string);

JSON.stringify returns []

Answer 1

If you want to use named keys in javascript, you should use an object as the JSON serializer ignores any named keys in arrays. A rule of thumb is that you should use arrays for [0] , [1] etc., but objects for ['foo'] , ['bar'] etc.

var obj = {
    'do': 'smth',
    'asd': {
        'dsa': 'alo'
    }
};

console.log( JSON.stringify(obj) );
//{"do":"smth","asd":{"dsa":"alo"}} 

Answer 2

You're creating an array, and use it as if it was a json object. You should create an object if you need an object.

var obj={};
obj['do']='smth';
obj['asd']=[];
obj['asd']['dsa']='alo';
var string=JSON.stringify(obj)
console.log(obj);
console.log(string);

Answer 3

Use an object:

var object = {};
object['do']='smth';
object['asd']=[];
object['asd']['dsa']='alo';
var string=JSON.stringify(object)
console.log(object);
console.log(string);

Answer 4

You cannot give the elements in an array names, they have their indizes as names. So if you would like to give them names use an JS-Object otherwise use the indizies in the definition as follows:

arr[0]='smth';
arr[1]=[];
arr[1][0]='alo';

Answer 5

请记住，JSON代表javascript对象表示法，您应该使对象具有必需的属性，而不是创建数组，因此将数组替换为{}并添加到其中