From: Daniel Berger <djberg96@...>
Date: 2005-01-27T01:15:47+09:00
Subject: Re: Array::uniq { block } ?

Belorion wrote:
> I have an array of arrays.  I want to be able to do a uniq operation
> on my array, and have it accept a block so I can specify what to
> examine for uniqueness.  For example, in IRB
>
> a = [ [1,2], [3,4], [1,3] ]
> a.sort { |x,y| x[0] <=> y[0] }
>
> returns => [ [1,2], [1,3], [3,4] ]
>
> However, it does not appear uniq accepts blocks:
>
> a = [ [1,2], [3,4], [1,3] ]
> a.uniq { |x,y| x[0] == y[0] }
>
> returns => [ [1,2], [3,4], [1,3] ]
> and a.uniq! with the above block returns nil.
>
> Am I stuck writing my own deep_uniq?  Granted, it would be hard, but
> certainly not as clean as the above.

Not that this is a bad idea, but why do I get this feeling that we're
eventually going to find an excuse to allow blocks to virtually every
method in the core library?

Where does it all end?!

Dan