From: "David A. Black" <dblack@...>
Date: 2004-05-19T06:14:38+09:00
Subject: Re: RCR: More enumerator functionality

Hi --

On Wed, 19 May 2004, Robert Klemme wrote:

> 
> "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.

Sorry; I was misreading the whole post, and therefore
misunderstanding.  


David

-- 
David A. Black
dblack@wobblini.net