On Mar 1, 5:26 pm, Martin P=F6pping <marti...@despammed.com> wrote:
> Hello,
>
> I=B4ve a general question about the visibility and modification of an obj=
ect.
>
> I will try to explain it in my code, where I have the problem:
>
> DocumentList dList =3D initDocuments(thesaurus);
>
> for (int i =3D 0; i < testRuns_; i++)
> {
> Algo algo =3D new Algo(dList, 1.1, anzahlCluster, thesaurus, initType_=
);
> run =3D algo.run(maxIter, epsilon);
> tests.add(i, run);
>
> }
>
> In my DocumentList dList I have a List of objects which I create with
> initDocuments().
>
> In the for-loop I am removing some objects (documents) out of the
> DocumentList with my method algo.run.
>
> Let=B4s say my DocumentList has a size of 100 _before_ entering the loop.
> If I call algo.run, I am removing 4 Documents out of my DocumentList.
> So I have 96 Documents in my list.
>
> But I thought, that I am removing these documents _only_ in my object
> "Algo" and not in my object dList which I have created _before_ entering
> the for-loop.
>
> In other words:
>
> I want to have 100 Documents in my DocumentList.
> Then I am doing the first loop iteration, removing 4 but when I am doing
> my second iteration, I want to have 100 Documents again and not 96.
>
> But that is exactly what happens.
>
> If I run my loop a second time, I only have 96 Documents and not 100
> Documents.
>
> Well.. I hope I explained it right and somebody understands my problem.
>
> My general question is about visibility and modifications of objects.
> How can I reach that my object "algo" does not change my object "dList"?
> In other words... the object "algo" should work with it=B4s own copy of
> the object dList.
>
> Regards,
>
> Martin

On Mar 1, 9:07 pm, Martin P=F6pping <marti...@despammed.com> wrote:
> justin creasy schrieb:
>
>
>
> >> I will try to explain it in my code, where I have the problem:
>
> >> DocumentList dList =3D initDocuments(thesaurus);
>
> >> for (int i =3D 0; i < testRuns_; i++)
> >> {
> >> Algo algo =3D new Algo(dList, 1.1, anzahlCluster, thesaurus, initTy=
pe_);
> >> run =3D algo.run(maxIter, epsilon);
> >> tests.add(i, run);
>
> >> }
>
> >> My general question is about visibility and modifications of objects.
> >> How can I reach that my object "algo" does not change my object "dList=
"?
> >> In other words... the object "algo" should work with it=B4s own copy of
> >> the object dList.
> > I think your problem might be in the Constructor for Algo. When you
> > assign the values of dList to I guess a local dList in the Algo
> > instance do you assign just the values? Please post the Constructor
> > and any other needs methods in the Algo class.
>
> Here is the Constructor:
>
> private DocumentList dList_;
>
> public A.go(DocumentList dList, double fuzzyness /*...*/)
> {
> logger_.Info("Initialisiere...);
> dList_ =3D dList;
> //...
>
> }
>
> I do not understand it. Remember:
>
> DocumentList dList =3D initDocuments(thesaurus);
>
> for (int i =3D 0; i < testRuns_; i++)
> {
> Algo algo =3D new Algo(dList, 1.1, anzahlCluster, thesaurus, initTyp=
e_);
> run =3D algo.run(maxIter, epsilon);
> tests.add(i, run);
>
> }
>
> In every iteration I am creating a _new_ object "algo" with a _new_
> Constructor.
>
> So I do not understand why I have the changes of my DocumentList made by
> algo in iteration 1 in my next algo in iteration 2.
>
> How could it be?
>
> Regards,
>
> Martin

>> I will try to explain it in my code, where I have the problem:
>>
>> DocumentList dList = initDocuments(thesaurus);
>>
>> for (int i = 0; i < testRuns_; i++)
>> {
>> Algo algo = new Algo(dList, 1.1, anzahlCluster, thesaurus, initType_);
>> run = algo.run(maxIter, epsilon);
>> tests.add(i, run);
>>
>> }
>>

>> My general question is about visibility and modifications of objects.
>> How can I reach that my object "algo" does not change my object "dList"?
>> In other words... the object "algo" should work with it´s own copy of
>> the object dList.

> I think your problem might be in the Constructor for Algo. When you
> assign the values of dList to I guess a local dList in the Algo
> instance do you assign just the values? Please post the Constructor
> and any other needs methods in the Algo class.

> I am not very familiar with the DocumentList control but it sounds
> like when you write
>
> dList_ = dList;
>
> it is copying a reference to dList, not the values of everything in
> dList. Read this MSDN article on how to use the DocumentList and see
> if it helps. Also look around to find out if DocumentList is passed as
> reference or value.
>
> http://msdn2.microsoft.com/en-us/library/ms172535.aspx

Martin P=F6pping <martin_p@despammed.com> wrote:

> So how can I find out if it is call by reference or call by value?