From: Martin DeMello <martindemello@...>
Date: 2008-06-12T02:19:29+09:00
Subject: Re: each with else

On Wed, Jun 11, 2008 at 9:54 AM, Thorsten Müller <thorsten@80beans.com> wrote:
>
> hmmmm, maybe the RCR should be even more comprehensive and
> request for a completely new language construct that would allow
> to built new core commands, based on multiple blocks.
> Not only if/then, but case/when also.
>
> But that's too much for now, a new each would be enough...

More simply, you can define an Object#if_empty

class Object
  def if_empty
    yield if self.empty?
  end
end

a.each {|x| do something}.if_empty { do something else }

this relies on the fact that obj#each returns obj.

martin