CoffeeScript Blows. Minds.
Was looking for a simple way to write an alternative of PHP’s in_array() function in JavaScript, and since I’m using actually writing CoffeeScript, decided to look there as well. And sure enough. Mind Blown.
for val,key in values if val in selected_values return "MIND BLOWN."
Turns into
var key, val, _i, _len, __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; }; for (key = _i = 0, _len = values.length; _i < _len; key = ++_i) { val = values[key]; if (__indexOf.call(selected_values, val) >= 0) { return "MIND BLOWN."; } }