From: "Derrick B." Date: 2012-12-29T12:26:08+09:00 Subject: Re: Ruby Koans regarding Hashes. 7stud -- wrote in post #1090536: > > 1) The block does not create the hash. If you look at the block: > > Hash.new { |hash, key| hash[key] = [] } > Agreed. Since we went from a simple: hash = Hash.new # no argument to new to hash = Hash.new { |hash, key| hash[key] = [] } # block as argument to new I just wanted to understand how the block supplied the argument to new. Done! Thanks for the examples, -- Posted via http://www.ruby-forum.com/.