javascript 常见数组操作（ 1、数组整体元素修改 2、 数组筛选 3、jquery 元素转数组 4、获取两个数组中相同部分或...

//map,给数组每个元素加1 输出[1,2,3] $.map([0,1,2],function(n){ return n+1; })
//输出[1,2,3]

$.map([0,1,2],function(n){ return n>0?n+1:null }) //[2,3]

 $("li").toArray() $.makeArray($("li"))

//去掉true则显示相同部分，保留true则显示不同部分 var a=[1,2,3,5,6,3,7,12], b=[1,3,5,12] $.grep(a,function(n,i){ if(b.indexOf(n)>=0) return n },true);
//[2,6,7]

 var a=[1,2,3,5,6,3,7,12]; $.unique(a)
// [12,7,6,5,3,2,1]

 var arr=[1,34,5,8,4,9,12] arr.sort(function(a,b){ return a-b; });

//顺序：a-b [1, 4, 5, 8, 9, 12, 34] //倒序：b-a [34, 12, 9, 8, 5, 4, 1]

var arr=[1,34,5,8,4,9,12]; arr.slice(2,4)
// [5,8]

 var arr=[1,34,5,8,4,9,12]; //删除 arr.splice(2,4) //arr 输出[1, 34, 12] //替换 arr.splice(1,2,3,4) //arr 输出[1, 3, 4, 8, 4, 9, 12] //插入 arr.splice(2,0,44) //arr 输出[1, 34, 44, 5, 8, 4, 9, 12]

var members=["1","2","3"]; $.each(members,function(i,item){ console.log(item); });

var arr = ['a','b','c','d']; arr.splice($.inArray('c',arr),1); console.log(arr);
// ['a','b','d']