From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2010-03-03T01:15:27+09:00
Subject: Re: Compute value inside define_method

On Tue, Mar 2, 2010 at 5:00 PM, Karl <threadhead@gmail.com> wrote:
> I know there is a 'trick' for forcing a value to compute, but I can't
> seem to remember or find it. The following routine needs to computer
> the value of 'register += 1' and not insert it literally.
>
> into.class_eval do
>              define_method "#{dow}_#{tod}_time" do
>                @registers.get_value( "#{register += 1}".to_i )
>              end
>    ...snip...
> end
>
> You can see my attempt above, but it doesn't work. Neither does
> 'eval("register += 1")'
>
> What's the trick? or should I approach the problem from a different
> angle?

What is register in your code above? Because this should work:

irb(main):005:0> register = 0
=> 0
irb(main):006:0> "#{register += 1}".to_i
=> 1
irb(main):008:0> register
=> 1
irb(main):009:0> "#{register += 1}".to_i
=> 2

On the other hand, if register is already and int and the get_value
method receives an int, why not just:

@registers.get_value(register += 1)

?

Jesus.