QT qstringlist usage

Hello everyone , I meet you again , I'm your friend, Quan Jun .

QStringList Class provides a list of strings from QList <QString> inherited , It provides fast index based access as well as fast insertion and removal Its member functions are used to manipulate this string list, such as append(),insert(), replace(), removeAll(), removeAt(), removeFirst(), removeLast(), and removeOne() etc. 1. Add string    Can pass append(), Or use <<, Such as    QStringList fonts;    fonts << “Arial” << “Helvetica” << “Times” << “Courier”;    // fonts:[ “Arial” ,”Helvetica”, “Times” , “Courier”] 2. Merge strings using join( )    QString str = fonts.join(“,”);    // str == “Arial,Helvetica,Times,Courier” 3. Split string    QString str = ” Arial,Helvetica, ,Times,Courier “;    QStringList list1 = str.split(“,”);    // list1: [ ” Arial “, ” Helvetica “,” “, ” Times “, ” Courier ” ]    QStringList list2 = str.split(“,”, QString::SkipEmptyParts);    // list2: [ ” Arial “, ” Helvetica “, ” Times “, ” Courier ” ]    That is to say, if there is QString：：SkipEmptyParts, Empty items will not appear in the result . By default , Blank items are reserved 4. Indexes    IndexOf（） The index() function returns the index of the first occurrence of a given string .    and lastIndexOf（） function , Returns the index of the last occurrence of a string . 5. Replace replaceInStrings（）    QStringList files;    files << “$QTDIR/src/moc/moc.y”    << “$QTDIR/src/moc/moc.l”    << “$QTDIR/include/qconfig.h”;    files.replaceInStrings(“$QTDIR”, “/usr/lib/qt”);    // files: [ “/usr/lib/qt/src/moc/moc.y”, …] 6. Filter filter（）    Allows you to extract a new list containing only those strings containing a specific string （ Or match a specific regular expression ）：    QStringList list;    list << “Bill Murray” << “John Doe” << “Bill Clinton”;    QStringList result;    result = list.filter(“Bill”);    // result: [“Bill Murray”, “Bill Clinton”]

7. Traverse

  QList<QString>::Iterator it = user.begin(),itend = user.end();   int i = 0;   for (;it != itend; it++,i++){    if (*it == pFindLine->text()){// find , Highlight     QModelIndex index = model->index(i);     m_pTabList->setCurrentIndex(index);     break;    }   }

Publisher ： Full stack programmer stack length , Reprint Please indicate the source ：https://javaforall.cn/132117.html Link to the original text ：https://javaforall.cn