From: James Edward Gray II <james@...>
Date: 2006-05-09T04:11:40+09:00
Subject: Re: How can I write the awesome kind of code?

On May 8, 2006, at 1:59 PM, Pat Maddox wrote:

> 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?

You can remove the &init parameter to hand(), since you are using  
yield.  You may also want to make players() and chips() more Rubyish  
with players=() and chips=().

To keep the hand object you could have hand return it, or perhaps add  
it to some global Hash by name.

Hope that helps.

James Edward Gray II