From: Jacob Fugal <lukfugl@...>
Date: 2005-10-06T10:07:49+09:00
Subject: Re: select! not present but reject! is

On 10/5/05, David A. Black <dblack@wobblini.net> wrote:
> Hi --
>
> On Thu, 6 Oct 2005, Jacob Fugal wrote:
>
> > Is there a reason Array#select! doesn't exist in the core?
>
> It seems like a strange concept to me.  I don't associate
> destructiveness with selecting.  I guess there would also be find_all!
> which seems even stranger :-)
>
> I know one *can* implement it (i.e., I'm not saying I don't know what
> it means).  I just don't think that in-place removal of items follows
> naturally as a ! version of selecting.

Well, maybe select! isn't the right name for it. But as a concept,
including the converse of reject! in the core would make sense, at
least to me. Maybe with a name like Array#keep!, telling ruby which
elements you want to keep and discarding the rest.

Jacob Fugal