From: Fabian Senftenberg <senf@...>
Date: 2001-12-11T18:02:45+09:00
Subject: [ruby-talk:28189] Re: Ensuring a specific type

Paul Brannan <paul@atdesk.com> writes:

>> class Interval
>>   @start = Time.new()
>>   @duration = 0
> 
> This is not correct.  You should not initialize instance variables here.
> 
>>   def initialize(s, d = 0)
>>     @start = s
>>     @duration = d
> 
> Instead, you should initialize them here.

Well, that makes my point (or question) even stronger. How do I ensure
that @start and @duration are of type Time in order to allow the
following:

>>   def end()
>>     return #{@start + @duration}.usec
>>   end

?

-- 
  senf