[Newbies] Does Set respect ordering?

[Thiede, Christoph]

Hi tty,


Set does not guarantee the order of elements. It's an implementation detail. If you only need to remove duplicates, have a look at #withoutDuplicates.

<http://www.hpi.de/>

Does this help? :-)

Best,
Christoph
________________________________
Von: Beginners <beginners-bounces at lists.squeakfoundation.org> im Auftrag von tty <gettimothy at zoho.com>
Gesendet: Dienstag, 11. Februar 2020 16:07:15
An: beginners at lists.squeakfoundation.org
Betreff: [Newbies] Does Set respect ordering?

Hi Folks.


If I have an OrderedCollection and convert it to Set via asSet, am I
guaranteed that the resulting Set contains elements in the same order as the
OrderedCollection?

Here is my problem.

I have an OrderedCollection with the same element in it twice. By same
element, I mean they are the same object.

*an OrderedCollection(
A
NESTED  TABLE CELL

B
A
NESTED  TABLE CELL

)
*

Above, the first and third elements are the same XMLElement. I now this
because if I inspect them and then change one, the other changes.

if I run asSet on the OrderedCollection, I get what I need:

*a Set( A
NESTED  TABLE CELL

B)*


In that conversion, can I rely on that Ordering being preserved?

If not, a pointer to the correct select/reject/inject/detect...sort of thing
would be much appreciated.

cheers.







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