From: Rob Biedenharn <Rob@...>
Date: 2008-02-23T07:28:45+09:00
Subject: Re: Need cohercing a var into a method name

On Feb 22, 2008, at 5:14 PM, Phy Prabab wrote:
> Hello,
>
> I need a small bit of help, I am playing with Logger class and ran  
> into a small problem I am not sure how to solve.  Namely, I was  
> interested in command line setting of the logging level, however,  
> the passed argument is not accepted as a method name nor can I  
> figure out how to get the arg "coherced" to a string prior to  
> evaluation of the method call.  Here is my code:
>
>  when "--debug"
>       if(DEBUG_LEVELS.include?(arg))
>         mylog.level = Logger::arg.to_s
>                              ^^^^^^^^^^^^
>       else
>         puts " "Debug level can be one of DEBUG, INFO, WARN, ERROR,  
> or FATAL."
>      .....
> (hi-lited is the code segment in question)
> I am using GetoptLong to do the cmd line processing.  The error  
> given by ruby is:
> test.rb:136 undefined method `arg' for Logger:Class (NoMethodError)
> ...
>
> TIA,
> Phy

Logger.const_get(arg)

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com