I am trying to compare the items in a QList. Here is the old way to do it using QPtrCollection but this cannot be used in versions after qt3 (as far as I'm aware).
class gnyComponentList:public QList<gnyComponent> { protected: virtual int compareItems ( QPtrCollection::Item item1, QPtrCollection::Item item2 ) { return (((gnyComponent *)item1)->getID()).compare(((gnyComponent *)item2)->getID());} }; I can't figure out what a good way of doing this in Qt5.3 might be?
You can use the std::equal algorithm on QList objects, as in:
#include <QList> #include <QString> #include <algorithm> // for std::equal struct Person { QString firstName; QString lastName; }; int main() { QList<Person> personsA, personsB; // Populate personsA and personsB bool equal = std::equal( personsA.begin(), personsA.end(), personsB.begin(), []( const Person &a, const Person & b ) { return a.firstName == b.firstName; } ); } 
This is a simple one, which compares every item without sorting. Here is the code.
bool TeachTab::isTwoStringListEqual(const QStringList &dst, const QStringList &src) { if (dst.size() != src.size()) return false; for (int i = 0; i < dst.size(); ++i) { if (dst.value(i) != src.value(i)) { return false; } } return true; } 