From: "David A. Black" <dblack@...>
Date: 2007-08-19T21:33:46+09:00
Subject: Re: Detecting duplicates in an array, anything in the standa

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Hi --

On Sun, 19 Aug 2007, Wolfgang N=C3=A1dasi-Donner wrote:

> David A. Black wrote:
>> Hi --
>>
>> On Sun, 19 Aug 2007, Wolfgang N=C3=A1dasi-Donner wrote:
>>
>>> : [r[0], r[1][1..-1]]}[0].uniq # =3D> ["c"]
>> How about:
>>
>>   >>  a =3D [1,2,3,4,5,4,2,2]
>>    =3D> [1, 2, 3, 4, 5, 4, 2, 2]
>>   >> a.inject([]) {|acc,e| acc << e unless acc.include?(e); acc }
>>    =3D> [1, 2, 3, 4, 5]
>>
>>
>> David
>
> The problem is, that he wants all non unique elements. Unfortunately the
> difference of two arrays doesn't care about double elements,

Sorry, just ignore me. I've reinvented Array#uniq :-)  /me reaches for
coffee....


David

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