From: Martin DeMello <martindemello@...>
Date: 2004-04-12T23:44:13+09:00
Subject: Re: zip block oddities/bug?

Simon Strandgaard <neoneye@adslhome.dk> wrote:
 
> To me it looks like concatenation of block result was 
> forgotten. Therefore I ask.. is it intended?
> 
> IMHO The 'each' behavier is othogonal from 'zip'.
> Then its better to remove the behaver completely or
> fix it. Leaving it unmodified confuses more than it helps.

Note the difference:

a.zip(b,c).map {|i| ... } # builds the array, then iterates over it
a.zip(b,c) {|i| ... }      # generates values one by one and calls block

If the latter functionality were not built into zip, there'd be no way
to do it from 'outside', short of using a continuation. As daz points
out, there are definitely times you'd want to iterate without building
either an intermediate or an output array.

martin