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 中加入了新的判断方法:

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

2、在考虑兼容性的情况下可以用toString的方法:

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]'
    }

}