c++ - How do iterate QMap in other QMap - Stack Overflow
Mar 15, 2019 · I look for on how to iterate a QMap in a other QMap like: QMap<int, QMap<int, QString>> map; Previously I used simple C++ std::map with the following code and that …
c++ - QMap::contains () VS QMap::find () - Stack Overflow
I would expect that QMap provides both functions for a better interface to the class. It's more natural to ask if the map 'contains' a value with a specified key than it is to call the 'find' …
How do I populate values of a static QMap in C++ Qt?
Nov 17, 2011 · QMap<column_t, QString> LogEvent::COLUMN_NAMES = initColumnNames(); Also, in case you want to use strings internationalization in static variables and need to call …
How to find specific value in Qmap - Stack Overflow
Sep 9, 2014 · A map provides quick access based upon the key (the first argument). So, yes, if you want to know if a value exists (the second argument), you would need to iterate over the …
Iterating over a QMap with for - Stack Overflow
Dec 15, 2011 · Since Qt 5.10, you can wrap QMap::keyValueBegin and QMap::keyValueEnd into a range and then use a range-based for loop to iterate that range. This works without copying …
qt - Order of items in QMap and QMultiMap - Stack Overflow
Dec 6, 2015 · From the Qt documentation about QMap::iterator : Unlike QHash, which stores its items in an arbitrary order, QMap stores its items ordered by key. Items that share the same …
How to show all keys inside QMap with QStringList?
Ok, I stand corrected. QMap can have more than one value under one and the same key. I totally overlooked 'insertMulti'. Nevertheless, the above statement is in so far still true, as the …
c++ - QMap vs QList Class in the Qt framework - Stack Overflow
May 21, 2019 · QList and QMap differ in the way the data is being organized. This results in different performance and slightly different memory consumption (for most use cases the latter …
Sort actual QMap by key - Stack Overflow
Nov 2, 2014 · And even if it did, as far as I understand, it would sort a copy of my original QMap. Is there any way to sort my QMap by key with the function for comparison keys provided?
QMap and QPair, C++, Qt - Stack Overflow
QMap<QPair<int, QString>, QString> multiAccess; but it can not help me (at least I don't know how to do it), because searching in a map needs to know ID and name together.