From: dblack@...
Date: 2007-08-02T10:49:31+09:00
Subject: Re: defining methods dynamically?

Hi --

On Thu, 2 Aug 2007, Kenneth McDonald wrote:

> Having looked through the Class and Method rdoc, and the Reflection section 
> of Pickaxe, and still not seeing anything (even though it was probably right 
> in front of my nose), I'm forced to fall on the mercy of strangers and 
> ask...how does one add a method to a class while the program is running?

There's actually no other way to do it :-)  But I think what you're
looking for is #define_method, which lets you define methods with
dynamically-determined names and also gives you a way to flatten the
variable scope of a method definition.

For example:

   str = "greet"
   c = Class.new
   c.class_eval { define_method(str) { puts "Hello" } }

   c.new.greet    # Hello


David

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