Hello! QMap::insert(const QMap &) was added in 5.15. No operator+ though.
https://doc.qt.io/qt-5/qmap.html#insert-2 ________________________________________ From: Interest <interest-boun...@qt-project.org> on behalf of Jason H <jh...@gmx.com> Sent: Tuesday, March 23, 2021 14:52 To: interestqt-project.org Subject: [Interest] Missing QMap Algebra? I've been in the python world lately and python has a dict.update() https://python-reference.readthedocs.io/en/latest/docs/dict/update.html It seems that QMap has no such function anymore, but it also never did? unite() would make a QMultiMap, so there would be multiple entries rather than one. Which has me asking the question, do I have to provide this myself? Seems a pretty trivial thing to have to provide? QVariantMap map_a, map_b; ... auto combined_map = map_a; for (const QString& key: map_b.keys()) { combined_map[key] = map_b[key]; } Additionally there is no + operator for it, which is actually what I want: combined_map = map_a + map_b; But I would be happy with: combined_map.update(map_b); Additionally if we're trying to provide as much algebra as possible: map_a = combined_map - map_b.keys() // remove by matching key map_a = combined_map - map_b; // remove by matching key-value pairs In Python, these are doable in a 1-line list/dict comprehension. Thoughts? _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
