From: walter@...
Date: 2004-07-03T08:46:48+09:00
Subject: Re: define_method to add a Class method?

> walter@mwsewall.com schrieb:
> > <snip>
> > I want to add a method to the class itself, and I want to be 
> > able to do it to an anonymous class.
> 
> c = Class.new do
>    class << self
>      define_method :m do p "m" end
>    end
> end
> 
> c.m   # ==> "m"
> 
> 
> HTH
> 
> Regards,
> Pit
> 

Excellent, That does work as expected.  I did try that previously, 
but my error was trying to pass in data to that context.

def create(data)
  Class.new do
    my_lambda = lambda{data}
    define_method("instance", my_lambda)  #this is fine
    
    class << self
      define_method("ok_method"){"ok method"}  #this is fine
      
      # the next method will throw a 
      # undefined local variable or method `my_lambda' 
      # for #<Class:#<Class:0x2a67840>> (NameError)
      define_method("data_passed_in", my_lambda) 
    end
  end
end
puts create("data").data_passed_in


I tried several similar variations.  I'll have to look into the 
scoping rules more to see how to overcome this.  It just shows me I 
need to study the language more.


Thanks everyone,


Walt
*****************************************************
Walter Szewelanczyk
IS Director
M.W. Sewall & CO.        email : walter@mwsewall.com     
259 Front St.            Phone : (207) 442-7994 x 128
Bath, ME 04530           Fax   : (207) 443-6284
*****************************************************