From: Robert Klemme <shortcutter@...>
Date: 2010-07-22T03:00:03+09:00
Subject: Re: ruby abstraction

On 22.07.2010 01:11, Clifford Heath wrote:
> Robert Klemme wrote:
>> 2010/7/19 Clifford Heath <no@spam.please.net>:
>>
>>> Interfaces provide Java with dynamic method dispatch, without the
>>> cost(*) of having every individual method in the dispatch table as
>>> is the case with Ruby and other dynamic languages.
>>
>> That sounds interesting. Can you please elaborate a bit more
>
> Because every object which implements an expected interface may have
> a different set of other interfaces, it requires a dynamic lookup
> to find the right one. Typically there are many fewer interfaces
> than methods of course, so the search is cheaper that way.

Wouldn't that mean duplicate entries for a method which is part of 
several interfaces?  And what happens in case of interface inheritance?

> Of course, there are many ways to optimise it, as Rick pointed out.
> Excellent paper, Rick, I enjoyed it.

Same here. :-)

Kind regards

	robert

-- 
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