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Hi, <br>
<br>
The "set" is a mathematical object which is defined by what it
contains, there isn't any order concept in it.<br>
<br>
So, by definition of set: {1,2,3} = {2,3,1}<br>
<br>
It makes not even sense to ask what is the first element of a set,
because there is no order in it. <br>
<br>
So, I guess Christoph is giving you the right hint, keep working
with OrderedCollection.<br>
<br>
Then, you may open your Squeak, on top of the Window select Help
-> Terse Guide To Squeak <br>
and check ouy "Bag" and "Set" sections.<br>
<br>
bye<br>
n.<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 2/11/20 7:11 AM, Thiede, Christoph
wrote:<br>
</div>
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<p>Hi tty,</p>
<p><br>
</p>
<p>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.</p>
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<div><font size="3" color="black"><span
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<div class="x__rp_T4" id="x_Item.MessagePartBody">Does
this help? :-)</div>
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<div class="x__rp_T4" id="x_Item.MessagePartBody">Best,</div>
<div class="x__rp_T4" id="x_Item.MessagePartBody">Christoph</div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>Von:</b>
Beginners
<a class="moz-txt-link-rfc2396E" href="mailto:beginners-bounces@lists.squeakfoundation.org"><beginners-bounces@lists.squeakfoundation.org></a> im
Auftrag von tty <a class="moz-txt-link-rfc2396E" href="mailto:gettimothy@zoho.com"><gettimothy@zoho.com></a><br>
<b>Gesendet:</b> Dienstag, 11. Februar 2020 16:07:15<br>
<b>An:</b> <a class="moz-txt-link-abbreviated" href="mailto:beginners@lists.squeakfoundation.org">beginners@lists.squeakfoundation.org</a><br>
<b>Betreff:</b> [Newbies] Does Set respect ordering?</font>
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<div class="PlainText">Hi Folks.<br>
<br>
<br>
If I have an OrderedCollection and convert it to Set via
asSet, am I<br>
guaranteed that the resulting Set contains elements in the
same order as the<br>
OrderedCollection?<br>
<br>
Here is my problem. <br>
<br>
I have an OrderedCollection with the same element in it
twice. By same<br>
element, I mean they are the same object.<br>
<br>
*an OrderedCollection(<br>
A<br>
NESTED TABLE CELL<br>
<br>
B <br>
A<br>
NESTED TABLE CELL<br>
<br>
)<br>
*<br>
<br>
Above, the first and third elements are the same XMLElement.
I now this<br>
because if I inspect them and then change one, the other
changes.<br>
<br>
if I run asSet on the OrderedCollection, I get what I need:<br>
<br>
*a Set( A<br>
NESTED TABLE CELL<br>
<br>
B)*<br>
<br>
<br>
In that conversion, can I rely on that Ordering being
preserved?<br>
<br>
If not, a pointer to the correct
select/reject/inject/detect...sort of thing<br>
would be much appreciated.<br>
<br>
cheers.<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
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