JS traversal JSON array and get JSON array length operation example [Test available]

The instance of this article describes the JS traversal JSON array and acquires the JSON array length operation. Share to everyone for reference, specifically:

  VAR Questions = data.data.questionNaire. Questions; // Traverse the JSON array for (VAR I in Questions) {if (Questions [I] .Type == ') {Alert (' Danxuan ');}}  

Get JSON array length:

Function getjsonLength (json) {var jsonLength = 0; for (Var i in json ) {JSONLENLENGTH;}
  Comprehensive test example:  

/ / Simple JSON arrays: var jsondemo = {“name”: “\ u811a \ u672c \ u4e4b \ u5bb6”, “addtime”: “2018-12-12”, “username”: “JB51”, “ID”: 5} // Traverse the JSON array: for (var i in jsondemo) {console.log (jsondemo [i]);} // Get JSON array length: function getjsonLength (json) {var jsonLength = 0;for (var i in json) {jsonLength ++;} return jsonLength;} console.log ( ‘array length:’ + getJsonLength (jsonDemo))

 Use  Online HTML / CSS / JavaScript code running tool : http: //tools.jb51.net/code/HtmlJsRun test code above obtained results are as follows: 

PS: here again recommend several related json online tools for your reference:

JS遍历JSON数组及获取JSON数组长度操作示例【测试可用】

online JSON code is test, test, landscaping, formatting tools:

http://tools.jb51.net/code/json

JSON
format online tools:

http: //tools.jb51. net / code / jsonformat

online XML / JSON interchangeable tools:
http://tools.jb51.net/code/xmljson

json
Code format online / beautification / compression / editing / conversion tools:

http://tools.jb51.net/code/jsoncodeformat

online json compression / escape tool:
http://tools.jb51.net/code/json_yasuo_trans

more about JavaScript to view the content site topic: “JavaScript in json operating skills summary “,” JaVascript Finding Algorithm Skill Summary “,” JavaScript Error and Debug Skill Summary “,” JavaScript Data Structure and Algorithm Skill Summary “,” JavaScript Overclic Algorithm and Skills Summary “and” Summary of JavaScript Mathematical Computing “

I hope this article The JavaScript programming is helpful.

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