From: Meino Christian Cramer <Meino.Cramer@...>
Date: 2003-09-13T17:08:34+09:00
Subject: Re: Duck Typing

From: dblack@superlink.net
Subject: Re: Duck Typing
Date: Sat, 13 Sep 2003 10:29:52 +0900

Hi, first of all: I am very happy to have a programming language with
such a communicative and friendly mailinglist!!! :)

	 GREAT!

(Whether it will be  a good idea or not to mirror the posts into a newsgroup
-- we will see. Previously I had made bad experiences, since my email
postbox was overloaded with spam. Spammers do scan newsgroups for
addresses... but this is quite another topic...) 

Back to the ducks !

> Or even, more generally, left with the impression that there's an
> on/off switch: if you say "is_a?" a lot, then you're not doing duck
> typing, whereas if you say "respond_to?" a lot, then you are -- when
> in fact it's really Ruby that's doing the duck typing, and you're
> just deciding how to react to it.

  If both works: is_a? and respond_to? : What is the advance of one
  over the other beside the fact, that one has a cool name : "Duck
  typing"? 

  Is one slower, less clean or ... ? I am just curious...
 

  Quak!   :)
  Meino