Struggling with a for loop

[LeLev]

Hi,
Sorry for this silly question but i spent more than 2 hours without success

My problem is :
i have a QList of items, the number of items is a multiple of a variable nbrOperationToRepeat
items have a method setPosX(int)

so lets say nbrOperationToRepeat = 3;
and i have 9 items

i want to iterate over the list and call setX() every 3 (nbrOperationToRepeat) items,

so the x of my items should be :

item.at(0) > 0
item.at(1) > 0
item.at(2) > 0

item.at(3) > 1
item.at(4) > 1
item.at(5) > 1

item.at(6) > 2
item.at(7) > 2
item.at(8) > 2

i feel like this sould be an easy task, but i'm not able to do it right now, can someone please help with this ?

for (int i = 0; i < finalOperationList.count(); i+=nbrOperationToRepeat ){ // finalOperationList.count() returns the number of items in the list

                for(int j = 0; j < nbrOperationToRepeat; j++){
                      qDebug()<< "edit at: " << i+j;
                       finalOperationList.at(i+j)->setPosX(/*?*/); // cant figure out what to put here.. 
                }
            }

thank you

[jsulm]

@LeLev

for (int i = 0; i < finalOperationList.count() / nbrOperationToRepeat; i++){
     for(int j = i * nbrOperationToRepeat; (j < i + nbrOperationToRepeat) && (j < finalOperationList.count()); j++){
         qDebug()<< "edit at: " << j;
         finalOperationList.at(j)->setPosX(i);
     }
 }

[J.Hilk]

@LeLev said in Struggling with a for loop:

for (int i = 0; i < finalOperationList.count(); i+=nbrOperationToRepeat ){ // finalOperationList.count() returns the number of items in the list

                for(int j = 0; j < nbrOperationToRepeat; j++){
                      qDebug()<< "edit at: " << i+j;
                       finalOperationList.at(i+j)->setPosX(i / nbrOperationToRepeat); //if nbrOperationToRepeat is a int and not a double or float
                }
            }

[LeLev]

@jsulm , @J-Hilk ,

Thank you very much for your inputs much appreciated

[KroMignon]

@LeLev said in Struggling with a for loop:

I would work with modulus operator:

for (int i = 0; i < finalOperationList.count();  ++i){
   int operationTodo = i % nbrOperationToRepeat;
   qDebug()<< "edit at: " << i << "and set:" << operationTodo ;
   finalOperationList.at(i)->setPosX(operationTodo);
}