From: Brian Candler <B.Candler@...>
Date: 2004-09-14T21:37:36+09:00
Subject: Re: Catching undefined global variable errors

On Tue, Sep 14, 2004 at 07:34:52PM +0900, George  Moschovitis wrote:
> Sorry everyone,
> 
> my example was wrong, THIS is the surprising code:
> 
> $the_key = "key1"
> 
> a = { "key1" => 1, "key2" => 2}
> 
> unless a[$the_ley] # orthographic error !!!
> # ruby doesnt catch this error
> puts "SURPRISE!!"
> end
> 
> the orthographic error is in the variable. Shouldnt this be catched by
> the interpreter ? Any ideas ?

Turning warnings on catches this:

# ruby -w scriptname.rb

or

#!/usr/local/bin/ruby -w  # at the top of the script

or 

$VERBOSE=true

Matz has said in the past that it was a mistake to leave warnings turned off
by default :-)

Regards,

Brian.