首页 / 脚本样式 / JavaScript / jQuery筛选数组之grep、each、inArray、map的用法及遍历json对象

$（）.ready（function（）{var array = [1,2,3,4,5,6,7,8,9];var filterarray = $.grep（array,function（value）{return value > 5;//筛选出大于5的}）;for（var i=0;i<filterarray.length;i++）{alert（filterarray[i]）;}for （key in filterarray）{alert（filterarray[key]）;}}）;

$（）.ready（function（）{var anObject = {one:1,two:2,three:3};//对json数组each$.each（anObject,function（name,value） {alert（name）;alert（value）;}）;var anArray = ["one","two","three"];$.each（anArray,function（n,value）{alert（n）;alert（value）;}）;}）;

$（）.ready（function（）{var anArray = ["one","two","three"];var index = $.inArray（‘two",anArray）;alert（index）;//返回该值在数组中的键值，返回1alert（anArray[index]）;//value is two}）;

$（）.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的缩写}）;for （key in values） {alert（values[key]）;}}）;

var json = [{dd:"SB",AA:"东东",re1:123},{cccc:"dd",lk:"1qw"}];for（var i=0,l=json.length;i<l;i++）{for（var key in json[i]）{alert（key+":"+json[i][key]）;}}

//有如下 json对象：var obj ={”name”:”冯娟”,”password”:”123456″,”department”:”技术部”,”sex”:” 女”,”old”:30};//遍历方法：for（var p in obj）{str = str+obj[p]+",";return str;}