From: Vicente Bosch Campos <vbosch@...>
Date: 2011-03-25T06:56:10+09:00
Subject: Re: Dynamically calling a certain set of methods

I am actually modifying the mutation methods and creating more on the fly .... loving metaprogramming capabilities in Ruby to code genetic algorithms: hence I think its best to not precompile.

In any case a great idea if I do something a bit less random. 

Thanks Simon.

On Mar 24, 2011, at 8:20 PM, Simon Kaczor wrote:

> You can save yourself some CPU cycles by pre-compiling the list of
> available methods as a class instance variable:
> 
> class Mutating
>  ...
>  @mutations = instance_methods.grep(/Mutation$/)
>  class << self
>    attr_reader :mutations
>  end
> 
>  def mutation
>    send(self.class.mutations.sample)
>  end
> end
> 
> Simon
> 
>>> First of all you can save typing by removing "self.".  Then you should
>>> replace #shuffle![0] with #sample:
>>> 
>>> send(methods.select!{|element| element.to_s.end_with?("Mutation")}.sample)
>>> 
>>> If you like you can strip this down even further by using regular
>>> expressions because those happen to work with Symbols as well:
>>> 
>>> send(methods.grep(/Mutation\z/).sample)
>>> 
>>> :-)
>>> 
>>> Kind regards
>>> 
>>> robert
>>> 
>>> -- 
>>> remember.guy do |as, often| as.you_can - without end
>>> http://blog.rubybestpractices.com/
>>> 
>> 
>> 
> 
>