Summary of various uses of JSON.stringify

 var data = [
     {name: "Wukong", sex:1, age: 30},
     {name: "Bajie", sex:0, age: 20},
     {name: "Tang Monk", sex:1, age: 30}
 ]; //The JavaScript array contains objects //Convert the JavaScript object to a string in JSON format var str_json = JSON.stringify(data);
console.log(str_json);
//The result of running is:
//[{"name":"Wukong","sex":1,"age":30},{"name":"Bajie","sex":0,"age":20},{"name":"Tang Monk","sex":1,"age":30}]

var data = [
    {name: "Wukong", sex:1, age: 30},
    {name: "Bajie", sex:0, age: 20},
    {name: "Tang Monk", sex:1, age: 30}
];
// Traditional way to extract data var new_data = [];
for (var i=0, new_data=[]; i<data.length; i++) {
    //Build the row array new_data.push({
        name: data[i].name,
        sex: data[i].age
    });
}
var str_json = JSON.stringify(new_data);
console.log(str_json);

var data = [
    {name: "Wukong", sex:1, age: 30},
    {name: "Bajie", sex:0, age: 20},
    {name: "Tang Monk", sex:1, age: 30}
];

var str_json = JSON.stringify(data,["name","age"]);
console.log(str_json);
//Running results	
//[{"name":"Wukong","age":30},{"name":"Bajie","age":20},{"name":"Tang Monk","age":30}]

var data = [
    {name: "Wukong", sex:1, age: 30},
    {name: "Bajie", sex:0, age: 20},
    {name: "Tang Monk", sex:1, age: 30}
];

var str_json = JSON.stringify(data,function (key, value) {
    if(key==="sex"){
        return ["Boy","Girl"][value];
    }
    return value;
});
console.log(str_json);
// [{"name":"Wukong","sex":"female","age":30},{"name":"Bajie","sex":"male","age":20},{"name":"Tang Monk","sex":"female","age":30}]

var data = [
    {name: "Wukong", sex:1, age: 30},
    {name: "Bajie", sex:0, age: 20},
    {name: "Tang Monk", sex:1, age: 30}
];

var str_json = JSON.stringify(data,["name","sex"],"\t");
console.log(str_json);
/*
[
	{
		"name": "Wukong",
		"sex": 1
	},
	{
		"name": "Bajie",
		"sex": 0
	},
	{
		"name": "Tang Monk",
		"sex": 1
	}
]
*/