Also, you’re not setting the instance variable - just returning an OrderedCollection - is that what you want to do?
e.g. setting the trees instance variable: trees ^ trees ifNil: [ trees := OrderedCollection new ] like Bernardo said, when you call #trees from within the #trees method (with self trees) - like in your first example, you created an infinite loop. > On 11 Mar 2017, at 3:36 pm, Bernardo Ezequiel Contreras > <vonbecm...@gmail.com> wrote: > > i think that in the first case you access an instance variable trees while in > the second case you send a message trees to self that cause an infinite > recursion. > am i right? > > > On Sat, Mar 11, 2017 at 12:57 AM, sergio ruiz <sergio....@gmail.com > <mailto:sergio....@gmail.com>> wrote: > I have a simple one, but i need to understand what is going on.. > > i have something like > > Tree > > with a class method > > trees > ^ trees ifNil: [OrderedCollection new] > > i initially ran into trouble with it locking my image up because i wrote it > as: > > trees > ^ self trees ifNil: [OrderedCollection new] > > what is the semantic difference between these two calls? > > THanks! > > > > ---- > peace, > sergio > photographer, journalist, visionary > > Public Key: http://bit.ly/29z9fG0 <http://bit.ly/29z9fG0> > #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV > http://www.Village-Buzz.com <http://www.village-buzz.com/> > http://www.ThoseOptimizeGuys.com <http://www.thoseoptimizeguys.com/> > http://www.coffee-black.com <http://www.coffee-black.com/> > http://www.painlessfrugality.com <http://www.painlessfrugality.com/> > http://www.twitter.com/sergio_101 <http://www.twitter.com/sergio_101> > http://www.facebook.com/sergio101 <http://www.facebook.com/sergio101> > > > -- > Bernardo E.C. > > Sent from a cheap desktop computer in South America.
