From: Brian Candler <b.candler@...>
Date: 2009-06-23T23:47:49+09:00
Subject: Re: map shall not return an Enumerator ( was re guru help )

Robert Dober wrote:
> On Tue, Jun 23, 2009 at 3:32 AM, David A. Black<dblack@rubypal.com> 
> wrote:
> <snip>>
> It would buy me
> coll.send_to_elements( :+ , 42 )
> coll.send_to_elements.join( ", ")
> versus
> coll.map{ |x| x + 42 }
> coll.map{ |x| x.join( ", ") }
> it is not so much about typing (although nobody would forbid aliasing
> #send_to_elements) but about readability.

The first I find pretty much unreadable. Send a message to each element, 
but do what with the result? Is it like inject perhaps?

The second is obvious. Iterate over the collection, mapping each element 
|x| to x + 42 (or whatever), and storing in a new collection.

Anyway, nobody stops you defining Enumerable#send_to_elements if you 
like it, without having to inflict it on the rest of us.
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