Ruby Golf

Ruby golf is the art of writing code that uses as few characters as possible. The idea originates in the world of Perl (where it is, unsurprisingly, known as Perl Golf). As a language, Perl is well suited to this as it has more than its fair share of bizarre constructs and syntactic sugar. Ruby also contains some large dollops of syntactic sugar which makes it suited to the odd round of golf.

More here:
Ruby Golf