From: "David A. Black" <dblack@...>
Date: 2009-12-24T08:19:44+09:00
Subject: [ruby-core:27301] Re: select!

Hi --

On Mon, 21 Dec 2009, Yukihiro Matsumoto wrote:

> Hi,
>
> In message "Re: [ruby-core:27242] select!"
>    on Sun, 20 Dec 2009 13:22:11 +0900, Roger Pack <rogerdpack@gmail.com> writes:
>
> |Is there any reason there's no select!
>
> Enumerables cannot have bang method, since they are not always
> mutable.  The reason we don't have Array#select! is that I feel the
> word select means picking up elements, not removing non-selecting
> elements.  But I once felt same way to map! and (English speaking)
> people persuaded me, so same thing could happen on select! as well.

I agree with you. The idea of a destructive select makes no sense to
me. Selecting implies that there's a result set that's separate from
the original collection.

"keep" might be a better name for an operation that's a kind of
reverse reject!.


David

-- 
David A. Black
Senior Developer, Cyrus Innovation Inc.
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