Here you can find the source of contains(search)
Array.prototype.contains = function(search) { return this.indexOf(search) !== -1; };
Array.prototype.contains = function(obj, firm) { firm = firm === true ? true : false; var i = this.length; while (i--) { if ((!firm && this[i] == obj) || this[i] === obj) { return true; return false; ...
Array.prototype.contains = function(object) { return (this.indexOf(object) != -1);
Array.prototype.contains = function(object) { if (this.indexOf(object) !== -1) { return true; return false; };
Array.prototype.contains = function(oneItem) var index = dojo.indexOf(this, oneItem); return index != -1;
Array.prototype.contains = function (query) function compare(element) return element === query; return this.some(compare); };
Array.prototype.contains = function(str) return this.indexOf(str) != -1; };
Array.prototype.contains = function(str) { var i = this.length; while (i--) { if (this[i] === str) {return true; } return false; };
Array.prototype.contains = function(target) { return this.indexOf(target) != -1; };
Array.prototype.contains = function (target, ordered) { ordered = ordered || false; var foundAll = true; if (ordered) { var lastIdx = -1; for (var i = 0; i <= target.length - 1; i++) { lastIdx = this.indexOf(target[i], lastIdx + 1); if (lastIdx == -1) { foundAll = false; ...