From: Pit Capitain <pit.capitain@...>
Date: 2008-01-31T21:49:54+09:00
Subject: Re: neat idea from arc

2008/1/30, Martin DeMello <martindemello@gmail.com>:
> I was thinking of this as a replacement for (and generalisation of)
> grep, since it would extend to other methods like #reject and
> #partition too

Martin, you can define

  class Object
    def to_proc
      lambda {|e| self === e }
    end
  end

and then

  [3,1,4,1,5].all?(&(1..5)))  # => true

Regards,
Pit