From: Joel VanderWerf <vjoel@...>
Date: 2002-06-10T05:59:19+09:00
Subject: Re: Unflatten


Thanks. BTW, I'll include #nest and #group in future versions of
"Enumerable Tools" on RAA.

Shashank Date wrote:
> 
> Excellent suggestions, Joel, I have added them my perosnal "goodies"
> library.
> And you are right, they do address  a different but similar problem.
> 
> I am studying your solution and being a newbie it is taking me a while for
> it to sink in ;-), but I am getting there.
> Thanks again.
> 
> "Joel VanderWerf" <vjoel@PATH.Berkeley.EDU> wrote in message
> news:3D013DB0.5811BD55@path.berkeley.edu...
> > Joel VanderWerf wrote:
> > > module Enumerable
> > >   def nest(&compare)
> > ..
> >
> > FWIW, I just realized that a grouping can be done very easily using
> > #nest:
> >
> > module Enumerable
> >   def group(&test)
> >     nest { |x| test[x] ? 1 : 0 }
> >   end
> > end
> >
> > p [1, 2, "three", "four", 5, "six"].group { |x| x.is_a? String }
> >
> >   ==> [1, 2, ["three", "four"], 5, ["six"]]
> >