Use grep, each, inarray, and map of jquery to Filter Arrays and traverse JSON objects

The following usage is recorded:

Jquery grep () filters and traverses Arrays

 $ (). Ready (  Function  (){  VaR Array = [1, 2, 3, 4, 5, 6, 7, 8, 9 ];  VaR Filterarray = $. grep (array, Function  (Value ){  Return Value> 5; //  Filter out more than 5  });  For (VaR I = 0; I <filterarray. length; I ++ ) {Alert (filterarray [I]);}  For (Key In  Filterarray) {alert (filterarray [Key]) ;}}); 

JqueryEach()Filter and traverse Arrays

$ (). Ready (Function(){VaRAnobject = {one: 1, two: 2, three: 3 };//For the JSON array each$. Each (anobject,Function(Name, value) {alert (name); alert (value );});VaRAnarray = ['one', 'two', 'three']; $. Each (anarray,Function(N, value) {alert (n); alert (value );});});
 

JqueryInarray()Filter and traverse Arrays

$ (). Ready (Function(){VaRAnarray = ['one', 'two', 'three'];VaRIndex =$. Inarray ('two', anarray); alert (INDEX );//Returns the key value of this value in the array, and returns 1Alert (anarray [Index]);//Value is two});
 

JqueryMap () filters and traverses Arrays

 $ (). Ready (  Function  (){  VaR Strings = ['0', '1', '2', '3', '4', 's', '6' ];  VaR Values = $. Map (strings, Function  (Value ){  VaR Result = New  Number (value );  Return Isnan (result )? Null : Result; //  Isnan: Is Not A number abbreviation  });  For (Key In  Values) {alert (Values [Key]) ;}}); 

JqueryParse JSON object 1:

 
VaRJSON = [{DD: 'SB ', AA: 'dongdong', RE1: 123}, {CCCC: 'dd', lk: '1qw'}];For(VaRI = 0, L = JSON. length; I <L; I ++){For(VaRKeyInJSON [I]) {alert (Key+ ':'+ JSON [I] [Key]) ;}}
 

Jquery traverses and parses JSON object 2

// The following JSON object is available:VaROBJ = {"name": "Feng Juan", "Password": "123456", "department": "technology department", "sex": "female", "old": 30}; // Traversal method:For(VaRPInOBJ) {Str= STR + OBJ [p] +',';ReturnSTR ;}