From: Hal Fulton <hal9000@...>
Date: 2003-12-19T09:25:49+09:00
Subject: Re: How to return more than one result from a method?

Tim Hunter wrote:
> On Fri, 19 Dec 2003 09:12:20 +0900, Chad Fowler wrote:
> 
>>What does the Float represent?  Perhaps there is a relationship between 
>>the two that would make a new type of class communicate better.  My 
>>thought is (generally) that if you can't tie the two return values 
>>together in some kind of meaningful way, you may be doing more than one 
>>job in the method and you could split the method in two.  That's just a 
>>heuristic of course.  Can you explain what the method does a little more?
>>
> 
> 
> The method compares two Images and returns a "difference" image (a new
> Image that graphically highlights the differences between the two input
> images). The Float is a "distortion" statistic - a measure of the amount
> of difference between the two.

Here are some ways to do it.

- an array might be easiest
- a Struct might be an option -- it's a little lighter weight than
   a class
- you could add the distortion as a singleton method on the new image


Hal