From: "Mauricio Fernández" <batsman.geo@...>
Date: 2003-04-09T01:30:48+09:00
Subject: Re: Array Sutraction

On Tue, Apr 08, 2003 at 11:35:02PM +0900, Jim Freeze wrote:
> > > > I'd view the substraction "a-b" as "remove all elements in b from
> > > > a",
> > > > which would reasonable lead to all 2's removed from [1,1,2,2,2]
> > > > yielding
> > > > [1,1].
> > > 
> > > 
> > > So [1, 1, 2, 2] - [2] should yield the same as [1, 1, 2, 2] - [2, 2]?
> > >  That seems odd to me.
> > 
> > I agree. But the presence of a Set in 1.8
> > maes me feel better. After all, an Array
> > is not in itself a bag or a set, so we can
> 
> Hmm, I was not aware that an Array was not a bag.
> Can you give an example Hal.

I believe he means that
 [1,1,2,2] - [2]   => [1,1] instead of [1,1,2]

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