Close, but a power set is the set of *all* subsets, not just the size-2 subsets.
On Wed, Apr 2, 2008 at 12:27 PM, Wes Clark <[EMAIL PROTECTED]> wrote: > 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 > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
