From: Explosiv0SX <explosiv0SX@...>
Date: 2005-10-17T11:07:39+09:00
Subject: Re: How to get non-unique elements from an array?

You could just sort the array, then iterate. If the previous  
iteration value is equal to the current, you have a non-unique. This  
would work with string or numeric data types.

Rick

On Oct 16, 2005, at 9:44 PM, Lyndon Samson wrote:

> Funny, doesnt work when an item in the array > 10...
>
> Plus, reading the documentation ( doh! ) I can access a Bignum bit  
> with []
>
>
> On 10/17/05, Lyndon Samson <lyndon.samson@gmail.com> wrote:
>
>>
>> Not very elegant, but a different approach...
>>
>> bn = bn2 = 0
>> a.each {|el|(bn2 |= (1<<el) if (bn & ( 1<<el) ) != 0) | bn |=  
>> (1<<el) }
>> 0.upto(a.length) { |bitNdx| puts bitNdx if (bn2 & ( 1<<bitNdx )) ! 
>> = 0 }
>>
>>
>>
>>
>
>
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