关于javascript:如何判断是否是数组How-to-judge-whether-it-is-a-array

如何判断是否是数组？

1、es6 中退出了新的判断办法:

if（Array.isArray(value)）{    return true;}

2、在思考兼容性的状况下能够用toString的办法:

if(!Array.isArray){    Array.isArray = function(arg){        return Object.prototype.toString.call(arg)==='[object Array]'    }}

How to judge whether it is a array ?

1、 There are some judgment methods has been added to es6 :

if（Array.isArray(value)）{    return true;}

2、You can use the function of toString that consider when the situation of compatibility is considered.

if(!Array.isArray){    Array.isArray = function(arg){        return Object.prototype.toString.call(arg)==='[object Array]'    }}