From: "Bartosz Dziewoński" <matma.rex@...>
Date: 2011-08-25T21:43:32+09:00
Subject: Re: New to Ruby some problems

[]= operator can take either two three arguments - they're written
like this: array[a, b] = c or array[a] = b (this is the same as
array.[]=(a, b, c) or array.[]=(a, b) ).

See the docs for this method to see why are the three arguments
needed: http://www.ruby-doc.org/core/classes/Array.html#M000219

-- Matma Rex