[Newbies] Re: How to empty a collection?

nicolas cellier ncellier at ifrance.com
Tue Feb 19 20:01:14 UTC 2008

cdrick a écrit :
> or again
> removeAll: aCollection
> 	aCollection == self
>                 ifTrue: [self removeAll: aCollection copy]
>                 ifFalse: [aCollection do: [:each | self remove: each]].
> Or maybe, if aCollection == self, a warning could be raised ?
> What do you think ?
> Cédrick

aCollection == self is not the only case that can fail.
Imagine i pass a wrapper collection on self, like a MappedCollection.

When i will change self with remove:, i will also change the argument 
which is just a wrapper on self.

Hope my explanations are not too much confusing...


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