From: Ruby Newbee <rubynewbee@...>
Date: 2010-01-02T21:20:02+09:00
Subject: can't understand for this each

Hello,

Please take a look at below.
what's each{ .. } in the find_all method?
I can't understand for it. thanks.

class Hash
  def find_all
    new_hash = Hash.new
    each { |k,v| new_hash[k] = v if yield(k, v) }
    new_hash
  end
end

squares = {0=>0, 1=>1, 2=>4, 3=>9}
z=squares.find_all { |key, value| key > 1 }
p z