From: FireAphis <FireAphis@...>
Date: 2007-08-09T13:34:58+09:00
Subject: Re: Iterating list in pairs

On Aug 8, 5:35 pm, "Robert Dober" <robert.do...@gmail.com> wrote:
> On 8/8/07, dbl...@rubypal.com <dbl...@rubypal.com> wrote:> Hi --
>
> > On Wed, 8 Aug 2007, Robert Dober wrote:
>
> > > require 'labrador/enum'
> > > a.zip(a.map.succ).map.join.first(-1)
>
> map without a parameter creates a Proxy object that contains the
> enumeration and the method name :map.
> It's method_missing forwards everything to the enumeration via send
> and the method name, thus
> map.join becomes
> map{|x| x.send(:join)}
>
> it is not everybody's cup of tea, but I love it, obviously.
> Labrador, the LAZY programmers best friend ;)
>
>  class EmptyProxy < EmptyObject
>     def initialize object, message
>       @enum = object
>       @message = message
>     end
>   end
>
>   class Dispatcher < EmptyProxy
>     def method_missing mth, *args, &blk
>       @enum.send(@message){|x| x.send(mth.to_sym,*args)}
>     end # def method_missing mth, *args, &blk
>   end # class Dispatcher < EmptyProxy
>
> Cheers
> Robert
>
> --
> [...] as simple as possible, but no simpler.
> -- Attributed to Albert Einstein

Thanks everybody for help and plethora of solution ideas you've been
very helpful.

Thanks again
FireAphis