From: Luca Pireddu <ilveroluca@...>
Date: 2005-04-23T08:39:32+09:00
Subject: Re: Nuby Question - How do you assign a function itself?

Austin Ziegler wrote:

> On 4/22/05, Sam Kong <sam.s.kong@gmail.com> wrote:
>> What I want is to assign the function to g so that I can call g instead
>> of f.
>> 
>> All I could find was
>> alias :g :f
> 
> You can't.
> 
> You can, however do:
> 
>   g = method(:f)
> 
> You can't just do g, though, because g is now a method object. You
> need to do either g.call or g[].
> 
> -austin

Another alternative may to to use Proc objects
f = Proc.new { |x| x*x }
g = f
g.call(2)

Or maybe a functor-style construct
class Raise
  def initialize(exponent)
    @exponent = exponent
  end
  def call(x)
�   return x ** @exponent
  end
end

f = Raise.new(3)
g = f
g.call(2)

Hope that helps

Luca