From: Mateusz Tybura <wujciol@...>
Date: 2008-08-18T22:46:57+09:00
Subject: Re: Hash#each vs Hash#each_pair

Patrick Doyle wrote:
> Sorry if this is a FAQ, but I'm curious to learn the rationale behind
> having Hash#each be the same as Hash#each_pair instead of
> Hash#each_value.
> 
> For my own (self-interested) case, I would prefer that Hash#each and
> Array#each both iterate through the values of the container.
> 
> So, why are these different?
> 
> --wpd

#!/usr/bin/ruby

hash = {1 => 'one', 2 => 'two', 3 => 'three'}

p "p hash : #{hash}"
p "hash.each"
hash.each do |e| #e is [key,value]
  p e
end

p "hash.each_pair"
hash.each_pair do |k,v| #k and v class as in hash
  p "#{k}=#{v}"
end


p "hash.each_value"
hash.each_value do |e| #e is value
  p e
end
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