[Newbies] Re: Recap: How to empty a collection

Janko Mivšek janko.mivsek at eranova.si
Wed Feb 20 09:28:14 UTC 2008

Ok, I reimplemented this method as Bert suggested and in the next 
version of Aida/Web it will be:

    "remove all elements quickly"
     self removeAllSuchThat: [:each | true]. "Squeak specific"
"   self become: OrderedCollection new " "VW specific"

Note that this method is still an extension of Aida and it must 
therefore be portable among dialects, which is the reason of commented 
code for VW above.

Best regards

Bert Freudenberg wrote:
> On Feb 20, 2008, at 2:01 , nicolas cellier wrote:

>>> One thing I wasn't clear on is whether Bert's suggestion:
>>> aColl removeAllSuchThat: [:anElement| true].
>>> Is okay, and why it's okay while many of the other similar approaches 
>>> were not.

>> Bert's suggestion is simple and works well.
>> The only question is about efficiency.
>> Up to (Down to?) subclasses to optimize it.

> #removeAllSuchThat: is actually optimized in subclasses (look at its 
> implementation in OrderedCollection).

Janko Mivšek
Smalltalk Web Application Server

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