js数组常用方法

var arr1 = ["a","b","c"];
var arr2 = ["e","f","g"];
var arr3 = ["2","1","6","4"];
var m = arr1.concat(arr2,"x","h");//arr1和arr2合并，并在数组中增加“x”和“h”
var m = arr1.join("-");//将arr1数组转化为字符串，数组中各个内容通过“-”连接
var m = arr1.pop();//删除数组中的最后一个元素
var m = arr1.push("xMan");//在数组后面加入一个元素
var m = arr1.reverse();//翻转数组内容
var m = arr1.shift();//删除数组的第一个元素
var m = arr1.slice(1);//返回数组中选定的元素，结果是a
var m = arr3.sort(sortNum);//数组排序。（sortNum是自定义的排序函数。function(a,b){return a-b}）
var m = arr3.splice(2,1,"haha");//删除数组中某个位置的元素，并插入元素。结果是["2","1","haha","4"]
var m = arr3.toString();//将数组转化为字符串
var m = arr3.valueOf();//返回数组对象的原始值