On Thu, Jan 19, 2017 at 3:51 PM, Siemen Baader <siemenbaa...@gmail.com> wrote:
> > On Thu, Jan 19, 2017 at 11:33 AM, Cyril Ferlicot D. < > cyril.ferli...@gmail.com> wrote: > >> >> You just need a class variable #UniqueInstance and those methods: >> >> current >> "Can also be named #default or #instance" >> ^ UniqueInstance >> ifNil: [ UniqueInstance := self basicNew; initialize; >> yourself ] >> > Actually this should have been: (no `;` between basicNew and initialize). ^ currentInstance ifNil: [ currentInstance := self basicNew initialize; yourself ] This is not a problem. But it illustrates that this would be nice to have it unit tested separately and mixed in with a trait/mixin to avoid the risk of manual errors in what in the end is an already solved problem - if one wants singletons, of course. :) Siemen > > Wouldn't a class instance variable be better? I want new singletons for > every subclass. http://rmod-pharo-mooc.lille.inria.fr/MOOC/Slides/Week3/ > C019-W3S03-Basic-Variables.pdf > > I would also have used super new, why BasicNew? But my wish to create > subclasses seems to answer that already. > > Thanks for your find-grained example, Cyril! > > Siemen >
