WebQStringList result; foreach ( const QString & str, list) { if (str. contains ( "Bill" )) result += str; } See also contains (). QStringList QStringList:: filter ( const QRegExp & rx ) const This is an overloaded function. Returns a list of all the strings that match the regular expression rx. WebAug 9, 2024 · If it would be array of Int's or Strings - would be easy, i'm done that simple before, but here is dynamic array of objects. Declaration in header file: mListItem *Item[]; ... On a crusade to banish setIndexWidget() from the holy land of Qt. 1 Reply Last reply Reply Quote 2. Engelard @VRonin last edited by @VRonin It's not working, ...
Qt
WebFeb 15, 2024 · @ManiRon said in how to copy a char array to a QString: memcpy (d.data (),command_packet,sizeof (TxCommandPacket)); Actually, d.data () returns a pointer to QChar, not char. How do you expect the size of the data buffer is ? Why not simply use QByteArray: QByteArray dataArray (command_packet, sizeof (TXCommandPacket)); 5 Web使用foreaach的代码比使用迭代器更简洁。对于QMap和QHash,foreach会自动访问“键–值”对里面的值,所以无需调用values(),注意foreach关键字遍历一个容器变量是创建了容器的一个副本,所以不能修改原来容器变量的数据项目。 qt中的foreach关键字 raglan death
Qt 4.8: Container Classes - University of Texas at Austin
WebMay 13, 2016 · Qt has – of course – a solution for the problems with index-based and iterator-based for-loops: the foreach macro. // Example 1d: Foreach Macro (Qt/C++) // thing.cpp (Qt/C++) void Thing::toggleTimers() { foreach (QTimer *timer, m_timerColl) { if (timer->isActive()) timer->stop(); else timer->start(); } } WebApr 10, 2024 · foreach (QString& str, strings) { // ToDo something } and for range-based for the record will be the next for (QString& str : strings) { // ToDo something } Preprocessor The keyword foreach is a macro, which in the end will be equivalent to this record for (QList::iterator it = strings.begin(); it != strings.end(); ++it) { http://duoduokou.com/php/40860296072078463521.html raglan fire stoves