Am 15.07.2008 um 13:23 schrieb nicolas cellier:
Bert Freudenberg a écrit :
Am 15.07.2008 um 08:26 schrieb Herbert König:
Hello Randal,
RLS> dictionary. This is how the classic "dependents" system
works as well: the
RLS> dependencies are in a WeakDictionary so that when the watched
object goes
RLS> away, the dependencies are also cleaned.
thanks for some free education (no smiley, I mean it), now I'll do
some homework and look up dependency.
I use it in some places without knowing of it's "weakness".
The dependents are weak only for "regular" objects. Proper Models
handle their own dependents collection in a non-weak manner.
- Bert -
Hmm, not really
"Warning: this example is stupid!"
| tmp |
tmp := Model new.
tmp addDependent: #x.
tmp addDependent: #y.
tmp dependents class. "=> DependentsArray"
DependentsArray is a class that holds weakly to its elements...
The difference is that the DependentsArray itself don't have to
pollute the global WeakIdentityKeyDictionary (Object classPool at:
#DependentsFields).
You are right, I was mislead by Object>>dependents ...
But maybe we have just quit the beginners rails...
... and you are right again.
- Bert -
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