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From "Mark R. Diggory" <>
Subject Re: [Math]: Jakarta commons Math package - code submission
Date Wed, 10 Dec 2003 15:22:07 GMT
Good idea,

I think we could look into initially adding it in the experimental 
section. We should review the commons collections capabilities and see 
if there are pre-existing Iterators or Decorators that this could 
utilize to improve its performance.


Marcin Jekot wrote:
> Hi,
>   sorry for not posting this to the mailing list, but I am not
> subscribed to the commons mailing list (is it high volume?).
> I have a class which allows you to do combinatorics (permutations and
> combinations) using java collections framework. So you pass in a List of
> objects, and you get back a List of Lists, of all the possible
> combinations or permutations.
> I have not even looked at all the available functionality in your source
> tree, but looking at the api docs I couldn't find anything similar. Is
> this something you'd be interested in?
> I could refactor the code to fit your package structure, and send it to
> you including JUnit tests. It's not fast (uses recursive method calls)
> but it's a start at least, which adds the functionality for starters,
> and can always be re-implemented better later on.
> Look forward to hearing from you.
> Regards
> -Marcin Jekot

Mark Diggory
Software Developer
Harvard MIT Data Center

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