From: myemail@... (andrea)
Date: 2008-05-12T07:10:08+09:00
Subject: Array#uniq with Hash elements... can't remove duplicates

Hello,

I am having some trouble trying to remove duplicate data from an array
of hashes. I've read on the pickaxe book that Array#uniq detects
duplicates using the eql? method on the elements, but it doesn't seem to
work even if I monkeypatch the Hash class:

class Hash
  def eql? other
    self == other
  end
end

a={:foo=>'bar'}
b={:foo=>'bar'}
array=[a,b]

a.eql? b
=> true
array.uniq
=> [{:foo=>"bar"}, {:foo=>"bar"}]

Of course, I'd like to get only [{:foo=>"bar}] as a result. Thanks in
advance for any help...

Andrea


-- 

http://myretrocomputing.altervista.org