Magnitude weakSubclass: #WeakKeyAssociation instanceVariableNames: 'value' classVariableNames: '' category: 'Collections-Support' weakSubclass: ... On 06 Sep 2014, at 16:47, Ben Coman <btc@openInWorld.com> wrote:

I'd like to learn a bit more about the implementation of Weak objects. For example, I see...

Magnitude>LookupKey>Associaton >> key: aKey value: anObject key := aKey. value := anObject

Magnitude>LookupKey>WeakValueAssociaton >> key: aKey value: anObject key := aKey. self value: anObject Magnitude>LookupKey>WeakValueAssociaton >> value: anObject self at: 1 put: anObject

Magnitude>WeakKeyAssociation >> key: aKey value: anObject self basicAt: 1 put: aKey. value := anObject

The class definitions don't look any different to normal? I can see that the weak classes are doing an #at:put: for their respective weak attribute, but lots of non-weak classes also use that. So what is it that makes WeakValueAssociaton & WeakKeyAssociation weak ?

cheers -ben