Here you can find the source of contains(element)
/**//from www .j a v a 2 s.c om * Returns true iif element is contained in the array. */ Array.prototype.contains = function(element) { return (arrValues.indexOf(element) > -1); }
Array.prototype.contains = function(element) { return this.indexOf(element) != -1; };
Array.prototype.contains = function(element) { return (-1 !== this.indexOf(element))
Array.prototype.contains = function(element) { for(var i = 0; i < this.length; i ++) if(this[i] === element) return true; return false; };
Array.prototype.contains = function(element) for (var i = 0; i < this.length; i++) if (this[i] == element) return true; return false; };
Array.prototype.contains = function (element) { for (var i = 0; i < this.length; i++) { if (this[i] == element) { return true; };
Array.prototype.contains = function(element) { if(!element) return false; for (var e in this) { var arrayElement = this[e]; if(element == arrayElement) { return true; ...
Array.prototype.contains = function(element){ return this.indexOf(element) > -1; };
Array.prototype.contains = function(elm) { for (var i = 0; i < this.length; i++) { if (elm == this[i]) return true; return false; };
Array.prototype.contains = function(i) { return this.indexOf(i) > -1; };