From: saladin.mundi@...
Date: 2007-11-18T01:10:54+09:00
Subject: Re: Observe variable set and variable change

> You can try trace_var (or whatever the name was)
>
> trace_var :$x, proc{print "$x is now ", $x, "\n"}

thanks guys. to trace_var
this as i see is just for tracing global vars. it would be great if there is 
a way for also tracing vars inside methods.

def x()
  z = 10
  z = 42
end

--> the variable z was initialized with the value 10
--> the variable z was changed with the value 42