Also, youâre 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 <vonbecmann@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.rrd@gmail.com <mailto:sergio.rrd@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!
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