From: Sam Roberts <sroberts@...>
Date: 2005-02-24T01:24:36+09:00
Subject: surprising: class A; end; A === A  ==> false

I'm used to thinking of === being MORE useful
On thinking about it, I can see why: in A === A, A is of class Class,
and that class is not derived from the class A, so comparison is
false...

But this causes me some trouble, because there is no way to use
case statements with a class:

  class A
   Ordinal = 1
  end
  class B
   Ordinal = 2
  end

  t = A

  case t
    when A then ...
    when B then ...
  end

No case will ever match!

Is my only way:

  if t == A
    ...
  elsif t == B
    ...
  elsif
    .....

or is there some clever workaround?

I thought of

  t = A

  case t.new
    when A then ...


But in my case, A and B actually have initialize methods, and they
require args (different args).


Thanks,
Sam

-- 
Sam Roberts <sroberts@certicom.com>