From: Robert Klemme <bob.news@...>
Date: 2004-05-19T04:13:48+09:00
Subject: Re: RCR: More enumerator functionality


"David A. Black" <dblack@wobblini.net> schrieb im Newsbeitrag
news:Pine.LNX.4.44.0405181140170.1696-100000@wobblini...
> Hi --
>
> On Mon, 17 May 2004, Kristof Bastiaensen wrote:
>
> > 5.enum_filter(:times){ |i| i[0] == 0 }.collect
> > => [2, 4]
>
> [...]
>
> > (2)* Enumerable::Enumerator takes a optional block
> >
> > powers = 4.enum_for(:times){ |i| i * i  }
> > powers.collect
> > => [0, 1, 4, 9]
>
> Keep in mind rejected RCR #50
> (http://www.rcrchive.net/rgarchive/rejected.html#rcr50).  It's perhaps
> not identical to what you're proposing, but very similar.  (It's
> proposed as a modification of #map.)
>
> (Aside: collect without a block returns an array with the same
> elements as the receiver, so there's probably no point calling it.)

Probably #to_a would be clearer here.  I guess the aim was to print an array
from the Enumerator.

    robert