From: Derek Wyatt <tone_hole@...>
Date: 2005-03-05T23:37:51+09:00
Subject: Array uniq

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Howdie,

I helped a guy out on IRC a couple of days ago and it set me to asking a
question.  He wanted to uniquify an array, but the natural equality of
his  objects was not how he wanted to do it.  So, this screams out the
need for a block, but uniq doesn't accept one.  I gave him this solution
instead:

~  h = {}
~  a.each { |x| h[x.thing] = x unless h.include?(x.thing) }
~  uniques = h.values

Total overkill when the following would be more fun:

~  a.uniq! { |x, y| x.thing == y.thing }

or something similar...

It seems strange that this hasn't already been done.  There must be a
good  reason...

Thoughts?

Regs,
Derek
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