Question

我正在寻找拆分和删除QString。 QString中有几个单词，由以下符号中的一个或多个（×）分隔：

A-frame×N
A-line×NA
A-OK×A
A-pole×N
A-Z test×h
A/C×N

输出

N
NA
A
N
h
N

src Qt C ++

QStringList verbs;
QFile inFile("example.txt");

    if ( inFile.open( QIODevice::ReadOnly | QIODevice::Text ) ) {
        QString line, value;
        QTextStream stream( &inFile );
        stream.setCodec("UTF-8");

        for (int counter = 0; counter < 23; counter++) {
            line = stream.readLine();
            QRegExp sep("\w+$");
            verbs << line.remove(sep);

        }
    qDebug() << verbs;
    }

输出

("3-D×AN", "4-F×N", "4-H'er×N", "4-H×A", "A battery×h", "a bon march×v", "a cappella×Av", "a capriccio×h", "a datu×h", "a fortiori×v", "a gogo×Av", "A horizon×h", "a la carte×Av", "a la king×A", "a la mode×A", "a la×P", "A level×h", "a posteriori×A", "a priori×A", "a punta d'arco×h", "a quo×h", "a rivederci×h", "A supply×h")

Answer 1

我试图根据提供的样本尽可能地概括模式：

[A-Z0-9][- \/]\b.+?\b×(?=\w{1,2}\b)

[A-Z0-9]  // 1 char within the defined ranges
[- \/]    // 1 char of defined options
\b.+?\b   // 1 or more chars of anything, lazily matched, surrounded
          // by word boundaries
×         // an ascii character
(?=       // looking ahead, assert the following matches
\w{1,2}\b // 1 or 2 word characters, then a word boundary
)         // end of look ahead

标志：g
步骤：237

Demo

如果使用模式运行替换为空白的函数，则可以获得所需的结果。如果要捕获结束字符，则需要对其进行分组（将前瞻变为捕获组（删除?=））。

Answer 2

首先，您需要使用命令设置区域设置 QTextCodec来:: setCodecForLocale（QTextCodec来:: codecForName（ “UTF-8”））; 之后你应该打开文件。

当你在线阅读字符串时，你应该使用正则表达式 QRegExp（QString :: fromUtf8（“[×]”

检查以下代码：

int main()
{

QStringList verbs;
QFile inFile("example.txt");

if ( inFile.open( QIODevice::ReadOnly | QIODevice::Text ) ) 
{
    QString line;
    QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
    QTextStream stream( &inFile );

    while(!stream.atEnd()) 
    {
        line = stream.readLine();
        int i = line.indexOf(QRegExp(QString::fromUtf8("[×]")),0);
        verbs << line.remove(0,i+1);

    }
qDebug() << verbs;
}


}

〜

Qt C ++ QRegExp删除dot之前的文本

输出

2 个答案: