Re: Can I check contain value in hash?

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From	Brian Candler <b.candler@pobox.com>
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Subject	Re: Can I check contain value in hash?
Date	Wed, 20 Apr 2011 03:33:47 -0500
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For some applications,

  dict[key] << val
  dict[key].uniq!

will be good enough. But this will still slow down if the number of 
values in the list gets large, in which case a hash of hashes would be 
better:

  dict[key] ||= {}
  dict[key][val] = true

To get the values, you'd then use dict[key].keys (which in ruby 1.8 
would be in an arbitrary order, and in 1.9 would be in order of first 
insertion)

-- 
Posted via http://www.ruby-forum.com/.

Thread

Can I check contain value in hash? Siratinee Sukachai <ploy.sukachai@gmail.com> - 2011-04-19 23:02 -0500
  Re: Can I check contain value in hash? Jesús Gabriel y Galán <jgabrielygalan@gmail.com> - 2011-04-20 02:49 -0500
    Re: Can I check contain value in hash? Brian Candler <b.candler@pobox.com> - 2011-04-20 03:33 -0500
      Re: Can I check contain value in hash? Robert Klemme <shortcutter@googlemail.com> - 2011-04-20 03:50 -0500
        Re: Can I check contain value in hash? Brian Candler <b.candler@pobox.com> - 2011-04-20 10:25 -0500
          Re: Can I check contain value in hash? Robert Klemme <shortcutter@googlemail.com> - 2011-04-21 02:12 -0500

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