Hi Fabien, As other already explained, you just discovered the marvelous Set collection.
Hilaire Le 14/06/2014 11:48, Fabian Boucsein a écrit : > i am new to Smalltalk and Pharo and today, while > trying out some examples, i observed an somewhat > strange behaviour. -- Dr. Geo http://drgeo.eu iStoa - https://launchpad.net/istoa
