but that’s an error, I think. a collection has to have always same hash… no matter its size (because is not an array) and no matter his elements.
> On 09 Oct 2015, at 15:21, Levente Uzonyi <[email protected]> wrote: > > You simply don't modify _objects_ which are used as keys in hashed > collections. Or if you do so, you'll have to deal with the consequences > yourself. > > Levente > > On Fri, 9 Oct 2015, Esteban Lorenzano wrote: > >> Hi, >> >> Can anyone explain me how this is correct? >> >> Collection>>#hash >> "Answer an integer hash value for the receiver such that, >> -- the hash value of an unchanged object is constant over time, and >> -- two equal objects have equal hash values" >> >> | hash | >> >> hash := self species hash. >> self size <= 10 ifTrue: >> [self do: [:elem | hash := hash bitXor: elem hash]]. >> ^hash bitXor: self size hash >> >> >> I mean… a hash that changes when I add elements to the collection… how can >> this work? >> >> Esteban
