From: "Mauricio Fernández" <batsman.geo@...>
Date: 2003-04-07T03:02:26+09:00
Subject: Re: 2 in [1,2,3] -> true

On Mon, Apr 07, 2003 at 02:46:03AM +0900, Meinrad Recheis wrote:
> hi,
> 
> i know
> > [1,2,3].member? 2 -> true
> is short but
> > 2 in [1,2,3] -> true
> would be very, very cool. i miss that most in ruby.
> this syntax comes from python, as far as i am concerned.
> 
> maybe some of you will say it isn t a good OO manner.
> maybe some of you will say that it wouldn t fit ruby's expression syntax 
> or concept
> 
> but i would like it so much that i had to get this lost.

batsman@kodos:/tmp$ expand -t2  b.rb
class Object
  def in(o)
    o.member? self
  end
end

p 2.in [1,2,3]
batsman@kodos:/tmp$ ruby b.rb
true

The price you pay for staying with Ruby isn't even one keystroke :-)
 

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