From: Ari Brown <ari@...>
Date: 2007-08-22T01:04:27+09:00
Subject: Re: Detecting duplicates in an array, anything in the standa


On Aug 21, 2007, at 4:59 AM, Pe�a, Botp wrote:

> From: Robert Klemme [mailto:shortcutter@googlemail.com]
> # irb(main):002:0> a.uniq.select{|e| (a-[e]).size < a.size - 1}
>
> compare also,
>
> irb(main):056:0> b=a.dup
> => [1, 1, 2, 2, 2, 4, 3]
> irb(main):057:0> b.uniq.select{|e| (b.reject!{|f| f == e}).size > 1}
> => [1, 2]

I still think it's easier just to union itself...

a = [1,2,3,2,1]
b = a & a
b = [1,2,3]
---------------------------------------------------------------|
~Ari
"I don't suffer from insanity. I enjoy every minute of it" --1337est  
man alive