From: Pat Maddox <pergesu@...>
Date: 2006-05-09T03:59:32+09:00
Subject: Re: How can I write the awesome kind of code?

On 5/8/06, James Edward Gray II <james@grayproductions.net> wrote:
> On May 8, 2006, at 1:38 PM, Pat Maddox wrote:
>
> > I'm writing a small app to do poker simulations.  I read a lot of
> > blogs in which the author shows off his cool DSL.  I decided I want to
> > be able to specify a poker hand in my app like
> >
> > hand "my_hand" do
> >  players 10
> >  chips     1000
> > end
> >
> > my_hand.foo
> >
> > How can I do something like that?
>
> class Hand
>    ...
> end
>
> def hand( ..., &init )
>    Hand.new( ... ).instance_eval(&init)
> end
>
> I really think you'll be happy in the long run though if you drop the
> instance_eval() and pass the hand into the block instead.
>
> James Edward Gray II
>
>

Okay so now I have

class Hand
  def players(p = nil)
    @players = p unless p.nil?
    @players
  end

  def chips(c = nil)
    @chips = c unless c.nil?
    @chips
  end
end

def hand(&init)
  yield(Hand.new) if block_given?
end

hand do |h|
  h.players 10
  h.chips   1000
end

Does that look right?

How can I use the Hand object that I just created?