I believe that is called the "power set".
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of James Carman
Sent: Wednesday, April 02, 2008 9:26 AM
To: Jakarta Commons Users List
Subject: Re: [Collections] "For each pair" iterator
That's more of a combinatorics problem. Perhaps math would be
interested in something like that?
On Wed, Apr 2, 2008 at 12:20 PM, Pedro Pedruzzi <[EMAIL PROTECTED]>
wrote:
> Hi,
>
> What I'd like to do is iterate through each subset of size 2 of a
Set.
>
> Example:
>
> My set is: S = {1,2,3,4}
> I'd like to iterate throught every one of these subsets:
> {1,2}, {1,3}, {1,4}, {2,3}, {2,4} and {3,4}.
>
>
>
> --
> Pedro Pedruzzi | V2COM | +55 11 3094-3939
>
>
>
>
> On Mon, Mar 31, 2008 at 11:59 PM, GUPTA GAURAV KUMAR
> <[EMAIL PROTECTED]> wrote:
> > Hi
> >
> > Please provide more details about your query. Better to give some
> > example.
> >
> > KR
> > Gaurav Kumar
> >
> >
> > -----Original Message-----
> > From: Pedro Pedruzzi [mailto:[EMAIL PROTECTED] > Sent:
> Tuesday, April 01, 2008 3:56 AM > To: [email protected] >
> Subject: [Collections] "For each pair" iterator > > > > Hi guys,
> > > I have a java.util.Set and I'd like to do a iteration like "for
> each > to distinct pair of elements" do something. In this case I
> don't care > for the ordering of the pair. A most precise way would
> be: "for each > subset of size 2" do something.
> >
> > Do the Apache Commons Collections provide some class to do this?
> >
> > Thanks in advance,
> >
> > --
> > Pedro Pedruzzi | V2COM | +55 11 3094-3939
>
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