Here you can find the source of has(e)
Array.prototype.has = function(e) { for(var i = 0; i < this.length; i++) if((e.equals) ? e.equals(this[i]) : e === this[i]) return true; return false;//from ww w .j a v a2 s . c om };
Array.prototype.has = function { return this.indexOf(item) > -1
Array.prototype.has = function(elem) { return this.indexOf(elem) !== -1; };
Array.prototype.has = function(elm) { return~~ this.indexOf(elm); };
"use strict"; Array.prototype.has = function (item) { return this.indexOf(item) > -1; };
Array.prototype.has = function(needle) { return $.inArray(needle, this) != -1; }; Object.prototype._toString = function() { this.str = ''; for (var prop in this) try if (typeof(this[prop]) != "undefined") this.str += prop + ': ' + this[prop] + "\n"; else this.str += prop + ': "",' + "\n"; } catch(e) {} return this.str; };