From: "Hal E. Fulton" <hal9000@...>
Date: 2003-04-08T23:21:29+09:00
Subject: Re: Array Sutraction

----- Original Message ----- 
From: "Michael Campbell" <michael_s_campbell@yahoo.com>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Tuesday, April 08, 2003 9:17 AM
Subject: Re: Array Sutraction


> > > 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
> > define its minus operator more or less
> > arbitrarily.
> 
> 
> I'll defer to others on the behavior (though I might still disagree),
> but I'd at least like to not have it change quite so drastically in a
> dot release.  (Is 1.6 -> 1.8 considered a dot release?)

That's the most disturbing part to me.

Is there at least a warning or something?

Of course, anyone who encounters a bug can
add his own Array#- which does a uniq after
(or before) calling the "real" one.

Hal