Go A summary of the operation of JS on JSON

Source: Internet
Author: User
Tags convert string to json string to json

This article transferred from: http://www.cnblogs.com/csj222/archive/2013/04/11/3013667.html

For the front end is completely rookie, forced to work in the use of JS, especially the processing of JSON for more, on-line search, the basic similarity. So the usual use of more JSON processing method summed up a bit, the right when deepening memory.

I. Overview

JSON (JavaScript Object Notation) is a lightweight data interchange format that is ideal for data interchange formats in a completely language-independent text format. At the same time, JSON is a native JavaScript format, which means that working with JSON data in JavaScript does not require any special APIs or toolkits.

In JSON, there are two kinds of structures: objects and arrays.

1. Objects

An object ends with "{" Starting with "}". Each "key" followed by a ":", "' Key/value ' pair" is applied "," separated.

Packjson = {"Name": "Nikita", "Password": "1111"}

2. Arrays

Packjson = [{"Name": "Nikita", "Password": "1111"}, {"Name": "Tony", "Password": "2222"}];

An array is an ordered collection of values. An array ends with "[" Start, "]". Use "," to separate values.

Second, JSON objects, and JSON Conversion of Strings

In the data transfer process, JSON is passed in the form of text, which is a string, and JS operates on a JSON object, so the conversion between the JSON object and the JSON string is key. For example:

JSON string:

var jsonstr = ' {' name ': ' Nikita ', ' Password ': ' 1111 '} ';

JSON object:

var jsonobj = {"Name": "Nikita", "Password": "1111"};

For the front end is completely rookie, forced to work in the use of JS, especially the processing of JSON for more, on-line search, the basic similarity. So the usual use of more JSON processing method summed up a bit, the right when deepening memory.

I. Overview

JSON (JavaScript Object Notation) is a lightweight data interchange format that is ideal for data interchange formats in a completely language-independent text format. At the same time, JSON is a native JavaScript format, which means that working with JSON data in JavaScript does not require any special APIs or toolkits.

In JSON, there are two kinds of structures: objects and arrays.

1. Objects

An object ends with "{" Starting with "}". Each "key" followed by a ":", "' Key/value ' pair" is applied "," separated.

Packjson = {"Name": "Nikita", "Password": "1111"}

2. Arrays

Packjson = [{"Name": "Nikita", "Password": "1111"}, {"Name": "Tony", "Password": "2222"}];

An array is an ordered collection of values. An array ends with "[" Start, "]". Use "," to separate values.

Second, JSON objects, and JSON Conversion of Strings

In the data transfer process, JSON is passed in the form of text, which is a string, and JS operates on a JSON object, so the conversion between the JSON object and the JSON string is key. For example:

JSON string:

var jsonstr = ' {' name ': ' Nikita ', ' Password ': ' 1111 '} ';

JSON object:

var jsonobj = {"Name": "Nikita", "Password": "1111"};

2. Convert string to JSON

Eval is a function of JS, not very safe, you can consider the JSON package.

Third, Traverse JSON Object

Myjson = {"Name": "Nikita", "Password": "1111"};for (var p in Myjson) {//traverse each key/value pair of JSON object, p is key   alert (P + "" + Myjs On[p]);}

Operation Result:

Four, Traverse JSON Array

Packjson = [{"Name": "Nikita", "Password": "1111"},{"name": "Tony", "Password": "2222"}];for (var p in Packjson) {// When traversing a JSON array, this writes p for the index, 0,1   alert (packjson[p].name + "" + Packjson[p].password);}

I'm more inclined to do this:

for (var i = 0; i < packjson.length; i++) {   alert (packjson[i].name + "+ Packjson[i].password);}

Operation Result:

Five, the two JSON object assembled into one inside

Targetjson Target Json,packjson is assembled jsonfunction Addgroupjson (Targetjson, Packjson) {    if (Targetjson && Packjson) {for       (Var p in Packjson) {           targetjson[p] = Packjson[p];}}    }

Use the following:

var json1 = {"Name": "Nikita"};var json2 = {"Password": "1111"};addgroupjson (Json1, Json2); alert (Json2str (Json1));

Operation Result:

Go A summary of the operation of JS on JSON

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