From: Robert Dober <robert.dober@...>
Date: 2007-04-13T04:32:42+09:00
Subject: Re: distinct

On 4/12/07, Brian Candler <B.Candler@pobox.com> wrote:
> On Fri, Apr 13, 2007 at 12:55:06AM +0900, Jean-S?bastien wrote:
> >   a little question... how to get distinct values from an hash?
> >
> > ex:
> > hash = {"a"=>100, "b"=>200, "d"=>100, "d"=>200}
> > ==> hash_with_distinct_values = [100, 200]
>
> irb(main):001:0> hash = {"a"=>100, "b"=>200, "d"=>100, "d"=>200}
> => {"a"=>100, "b"=>200, "d"=>200}
> irb(main):002:0> hash.invert.keys
> => [100, 200]
>
>
I would have completely agreed with hash.values.uniq as the simplest
solution, but has.invert.keys is extremely surprising, thx Brian.

Robert


-- 
You see things; and you say Why?
But I dream things that never were; and I say Why not?
-- George Bernard Shaw