From: Paul Battley <pbattley@...>
Date: 2006-03-14T18:05:58+09:00
Subject: Re: Writing Good #each Methods?

I'd also add
* If appropriate, inspect the arity of the block and provide the
requested number of parameters.

Hash#each's behaviour is a good example:
hash = {:a=>1, :b=>2}
hash.each { |x| p x }
# [:b, 2]
# [:a, 1]
hash.each { |k,v| puts "#{k.inspect} => #{v.inspect}" }
# :b => 2
# :a => 1

Paul.