indexOf, applied to a String, returns the index of the first occurrence of a specified value. Useful as it is, I often find myself wishing for a variant method that will return the index after the occurrence so that I can pass the result to a slice call and return everything after a given character.
With this in mind, I created a method called
express (as in expression, and alsoquick) which returns a new function by applying the expression argument to the result of the old function. Its partly inspired by the Haskell language and by Oliver Steele’s
String.prototype.indexAfter = String.prototype.indexOf.express('r + 1');