From: Glen Holcomb <damnbigman@...>
Date: 2008-08-29T05:07:15+09:00
Subject: Re: Use a string as a method call

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On Thu, Aug 28, 2008 at 2:02 PM, Chris Bailey <
christopher.sean.bailey@gmail.com> wrote:

>  I'm trying to come up with an efficient way of using user input as a
> way of calling methods. I'm unhappy with the way that I am doing it
> because it isn't very flexible. This is what I'm doing now.
>
> input = gets.downcase.chomp
>
> if input == foo
>    do_foo()
> elsif input == bar
>    do_bar()
> else
>    puts "That isn't a command!"
> end
>
> What I would like to do is more like so.
>
> commands = {
>            'foo'   =>      do_foo(),
>            'bar'   =>      do_bar()
>           }
>
> I then would like to search the commands hash for a key that matches the
> player input and execute the method associated with that key. What I've
> noticed is that upon initialization of the hash the value becomes equal
> to the result of the method but that is not what I want. If I store the
> value as a string ie "do_foo()" would I be able to parse that string and
> execute it as a method? And if so, how would that be done?
> --
> Posted via http://www.ruby-forum.com/.
>
>
You could do it with eval in this case it sounds like that would be fairly
safe although you could also use a proc I think.

-- 
"Hey brother Christian with your high and mighty errand, Your actions speak
so loud, I can't hear a word you're saying."

-Greg Graffin (Bad Religion)

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