From: Anders Bengtsson <ndrsbngtssn@...>
Date: 2001-04-17T22:29:28+09:00
Subject: [ruby-talk:13751] Re: methods and types

 --- Dave Thomas <Dave@PragmaticProgrammer.com> wrote:
> Second, I use Ruby's type tolerance to advantage
> during testing.
> Perhaps I have a routine that's going to add some
> data to a file. I
> know it uses '<<' to do the append, so during
> testing I can pass in an
> empty string, and then check the value in that
> string when the routine
> exits.

This may be an instance of some design pattern about
strings. When programming in Ruby i often start out
with string representations of data, and only later
change it to use a more specific class.

An example could be an adress book application. In
Java I would probably have a Name class from the
start, that knows about family names and given names,
and having a Person class with a field of type Name.
In Ruby I would use a String for the name, up to the
moment that I needed to operate on parts of the name,
when I would simply switch to using Name instances,
without having to modify Person.

/Anders


=====
__________________________________________________
Anders Bengtsson              ndrsbngtssn@yahoo.se
Stockholm, Sweden

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