On Fri, 27 Aug 2010, Guillermo Polito wrote:
In my machine:
o := OrderedCollection new: 1000. 1 to: 1000 do: [ :each | o add: each ]. [ 100000 timesRepeat: [ o addFirst: o removeLast ] ] timeToRun. ==> 12842
o := LinkedList new: 1000. 1 to: 1000 do: [ :each | o add: each ]. [ 100000 timesRepeat: [ o addFirst: o removeLast ] ] timeToRun. ==> 5603
LinkedList should be used this way if you want to use it as a Queue: o := LinkedList new: 1000. 1 to: 1000 do: [ :each | o add: each ]. [ 100000 timesRepeat: [ o addLast: o removeFirst ] ] timeToRun. "===> 119" Levente
On Fri, Aug 27, 2010 at 1:35 PM, Levente Uzonyi <leves@elte.hu> wrote:
On Thu, 26 Aug 2010, Lukas Renggli wrote:
I wonder why there is the need for a stack class at all?
OrderedCollection is the class designed to do Stacks and Queues efficiently and portably, see #addFirst:, #addLast:, #first, #last, #removeFirst, #removeLast.
If so, then there are some problems:
o := OrderedCollection new: 1000. 1 to: 1000 do: [ :each | o add: each ]. [ 100000 timesRepeat: [ o addFirst: o removeLast ] ] timeToRun. "===> 11660"
Levente
Lukas
2010/8/26 Bart Gauquie <bart.gauquie@gmail.com>:
Hi list,
is there a specific reason Stack is extending from LinkedList, instead of using a LinkedList internally? To me, it seems that the protocol that LinkedList, SequenceableCollection, ... provides is not the protocol you expect from a Stack?
Any thoughts on this?
Kind regards,
Bart
-- imagination is more important than knowledge - Albert Einstein Logic will get you from A to B. Imagination will take you everywhere - Albert Einstein Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning. - Albert Einstein The true sign of intelligence is not knowledge but imagination. - Albert Einstein However beautiful the strategy, you should occasionally look at the results. - Sir Winston Churchill It's not enough that we do our best; sometimes we have to do what's required. - Sir Winston Churchill
_______________________________________________ Pharo-project mailing list Pharo-project@lists.gforge.inria.fr http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
-- Lukas Renggli www.lukas-renggli.ch
_______________________________________________ Pharo-project mailing list Pharo-project@lists.gforge.inria.fr http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
_______________________________________________ Pharo-project mailing list Pharo-project@lists.gforge.inria.fr http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project