From: "Peña, Botp" <botp@...>
Date: 2005-04-19T10:27:05+09:00
Subject: Re: how do you know which class pars belong to?

Leonardo Francalanci [mailto:lfrancalanci@simtel.it] wrote:

#Hello,
#
#I've found Ruby very interesting. I like it, but coming from a Java 
#background I'm having some problems when it comes to parameters and 
#function return values. When I program in Java, I just have a look at 
#the method definition and I know what classes I have to pass to the 
#method and what class the method will return. And, if I write 
#something 
#wrong, the compiler will warn me. Now: how do you do it in 
#Ruby? Do you 

ruby is dynamic, so no, no warning/checking. You can check it yourself but
it becomes part of the code. Again, there are pros/cons. Ultimately, at the
application level, one really has to check using code. Remember, do not
trust the compiler/interpreter, or should we say, verify, verify, verify.

You can use unittests/assertions and mimic eiffel's pre/post-condition. Your
code will look unclean, so use an editor that can fold/unshow assert
statements or any statement/block you don't want to view...

kind regards -botp