From: Dave Bass <davebass@...>
Date: 2008-05-30T06:20:05+09:00
Subject: Re: Constants in modules

Luis Crespo wrote:
> ...But I did not realize that the constant code is executed when reading 
> the module, so I had to define the method before.

Yes, this is a common gotcha.

Personally I like to have the main program at the top of my code, but 
Ruby wants me to put it at the bottom, so it's seen all the function 
definitions before I try to call them. You can get around it like this:

def main
  # ...
end

def function1
  # ...
end

def function2
  # ...
end

main

Defining a "main" function comes naturally to C programmers, but in Ruby 
you actually have to call it at the bottom. ;-)
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