12313123 123123: 123123 function(obj, start) { for (var i = (start || 0), j = this.length; i < j; i++) { if (this[i] === obj) { return i; } } return -1; } function(a){if(void 0===this||null===this)throw new TypeError;var b=Object(this),d=b.length>>>0;if("function"!==typeof a)throw new TypeError;for(var g=2<=arguments.length?arguments[1]:void 0,e=0;e<d;e++)e in b&&a.call(g,b[e],e,b)}

Dziadek Mróz: Jaki język?