From: Ned Konz <ned@...>
Date: 2002-07-10T02:33:57+09:00
Subject: Re: for ... else ... end

On Tuesday 09 July 2002 10:18 am, Austin Ziegler wrote:

> It might be nice to have some syntactic sugar that does something
> like that:
>
> array.each { |e| puts e } unless array.empty then puts "Empty
> array"
>
> (Not currently possible, AFAIK, and probably really nasty in the
> interpretation of same.)
>

class Array
  def each_if_empty(blk1, &blk2)
    if empty?
      return blk1.call
    else
      each(&blk2)
      return self
    end
  end
end

[].each_if_empty(proc{ p 'is empty' }) { |item| p item }

[1,2,3].each_if_empty(proc{ p 'is empty' }) { |item| p item }

-- 
Ned Konz
http://bike-nomad.com
GPG key ID: BEEA7EFE