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1    alert(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;}