This little script is used to test if an array is really an array or not.

isArray.js

"use strict";
if (Array.prototype.isArray === undefined) {
    Array.prototype.isArray = function (value) {
        return Object.prototype.toString.apply(value) === "[object Array]";
    };
}
/*
Examples
*/
Array.isArray({}); //false
Array.isArray([]); //true

var animals = ["Cat","Dog","Horse"];
Array.isArray(animals); //True