Le 22/10/2015 22:58, stepharo a écrit : > Hi > > I was programming an exercise with one of my son (well in Python.... > arghhhhhh) > and I end it up doing it in Pharo (I'm save now). > > The idea was to write one function that computes the powerset > > powerset(4) > = a Set(a Set(1) a Set(1 2) a Set(3) a Set(2) a Set(1 3) a Set(2 3) > a Set(1 2 3) a Set(4) a Set(1 4) a Set(2 4) a Set(1 2 4) a Set(3 4) a > Set(1 3 4) a Set(2 3 4) a Set(1 2 3 4)) > > I did it without thinking too much in fact > > | s n ps | > ps := Set new. > > 1 to: ((2 raisedTo: 4) -1) > do: [ :i | > s := Set new. > n := 0. > 1 to: 4 do: [ :b | > n := n + 1. > ((i bitAt: b) = 1 ) > ifTrue: [ s add: n]. > ps add: s ]]. > ps > > but I wonder if we want to add it to our lib. > > Stef >
Hi, Want would be the uses of this method? -- Cyril Ferlicot http://www.synectique.eu 165 Avenue Bretagne Lille 59000 France
signature.asc
Description: OpenPGP digital signature
