From: Martin DeMello <martindemello@...>
Date: 2006-08-07T05:58:42+09:00
Subject: Re: Iterating over an array n element at a time

On 8/6/06, Rick DeNatale <rick.denatale@gmail.com> wrote:
> On 8/5/06, Martin DeMello <martindemello@gmail.com> wrote:
> > require 'enumerator'
> >
> > module Enumerable
> >   def eachn(&block)
> >     n = block.arity
> >     each_slice(n) {|i| block.call(*i)}
> >   end
> > end
> >
> > a = (1..10).to_a
> > a.eachn {|x,y,z| p [x,y,z]}
>
> Nice!  As it turns out that  *i in the block.call invocation isn't
> needed.  The proc call method does the right thing in this case.

Huh - you're right, block.call(i) works nicely without the splat. I
guess it's because the argument list 'picks apart' the array. Good
catch.

martin