From: AD60 <andredeen@...>
Date: 2009-03-01T09:38:57+09:00
Subject: Re: Newbie question > Hash workings

Thank you both for seeing the light at the end of the tunnel. I fully
understand what I have to do to get it working but just to clarify;

By doing "h[2] << 20" I modified the original empty array I set as a
default value and inserted no hash key because it is not an assignment
to h?

Replacing the "h = Hash.new([])" with "h = Hash.new { |h,k| h[k] =
[]}" and just doing "p h[2]" before any assigment to h[2] has the
surprising/logical side effect of creating a new key "2", thank god
with value "[]" so no problems there, but still... I am now thinking
that stating "h = Hash.new([])" is problematic idiom under all
circumstances. Am I correct?

Kind regards,
André