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//! [0]
QRegExp rx("(\\d+)");
QString str = "Offsets: 12 14 99 231 7";
QStringList list;
int pos = 0;
while ((pos = rx.indexIn(str, pos)) != -1) {
list << rx.cap(1);
pos += rx.matchedLength();
}
// list: ["12", "14", "99", "231", "7"]
//! [0]
//! [1]
QRegExp rx("*.txt");
rx.setPatternSyntax(QRegExp::Wildcard);
rx.exactMatch("README.txt"); // returns true
rx.exactMatch("welcome.txt.bak"); // returns false
//! [1]
//! [2]
QRegExp rx("ro+m");
rx.setMinimal(true);
//! [2]
//! [3]
QRegExp mark("\\b" // word boundary
"[Mm]ark" // the word we want to match
);
//! [3]
//! [4]
QRegExp rx("^\\d\\d?$"); // match integers 0 to 99
rx.indexIn("123"); // returns -1 (no match)
rx.indexIn("-6"); // returns -1 (no match)
rx.indexIn("6"); // returns 0 (matched as position 0)
//! [4]
//! [5]
QRegExp rx("^\\S+$"); // match strings without whitespace
rx.indexIn("Hello world"); // returns -1 (no match)
rx.indexIn("This_is-OK"); // returns 0 (matched at position 0)
//! [5]
//! [6]
QRegExp rx("\\b(mail|letter|correspondence)\\b");
rx.indexIn("I sent you an email"); // returns -1 (no match)
rx.indexIn("Please write the letter"); // returns 17
//! [6]
//! [7]
QString captured = rx.cap(1); // captured == "letter"
//! [7]
//! [8]
QRegExp rx("&(?!amp;)"); // match ampersands but not &
QString line1 = "This & that";
line1.replace(rx, "&");
// line1 == "This & that"
QString line2 = "His & hers & theirs";
line2.replace(rx, "&");
// line2 == "His & hers & theirs"
//! [8]
//! [9]
QString str = "One Eric another Eirik, and an Ericsson. "
"How many Eiriks, Eric?";
QRegExp rx("\\b(Eric|Eirik)\\b"); // match Eric or Eirik
int pos = 0; // where we are in the string
int count = 0; // how many Eric and Eirik's we've counted
while (pos >= 0) {
pos = rx.indexIn(str, pos);
if (pos >= 0) {
++pos; // move along in str
++count; // count our Eric or Eirik
}
}
//! [9]
//! [10]
str = "Nokia Corporation\tqt.nokia.com\tNorway";
QString company, web, country;
rx.setPattern("^([^\t]+)\t([^\t]+)\t([^\t]+)$");
if (rx.indexIn(str) != -1) {
company = rx.cap(1);
web = rx.cap(2);
country = rx.cap(3);
}
//! [10]
//! [11]
QStringList field = str.split("\t");
//! [11]
//! [12]
QRegExp rx("*.html");
rx.setPatternSyntax(QRegExp::Wildcard);
rx.exactMatch("index.html"); // returns true
rx.exactMatch("default.htm"); // returns false
rx.exactMatch("readme.txt"); // returns false
//! [12]
//! [13]
QString str = "offsets: 1.23 .50 71.00 6.00";
QRegExp rx("\\d*\\.\\d+"); // primitive floating point matching
int count = 0;
int pos = 0;
while ((pos = rx.indexIn(str, pos)) != -1) {
++count;
pos += rx.matchedLength();
}
// pos will be 9, 14, 18 and finally 24; count will end up as 4
//! [13]
//! [14]
QRegExp rx("(\\d+)(\\s*)(cm|inch(es)?)");
int pos = rx.indexIn("Length: 36 inches");
QStringList list = rx.capturedTexts();
// list is now ("36 inches", "36", " ", "inches", "es")
//! [14]
//! [15]
QRegExp rx("(\\d+)(?:\\s*)(cm|inch(?:es)?)");
int pos = rx.indexIn("Length: 36 inches");
QStringList list = rx.capturedTexts();
// list is now ("36 inches", "36", "inches")
//! [15]
//! [16]
QStringList list = rx.capturedTexts();
QStringList::iterator it = list.begin();
while (it != list.end()) {
myProcessing(*it);
++it;
}
//! [16]
//! [17]
QRegExp rxlen("(\\d+)(?:\\s*)(cm|inch)");
int pos = rxlen.indexIn("Length: 189cm");
if (pos > -1) {
QString value = rxlen.cap(1); // "189"
QString unit = rxlen.cap(2); // "cm"
// ...
}
//! [17]
//! [18]
QRegExp rx("/([a-z]+)/([a-z]+)");
rx.indexIn("Output /dev/null"); // returns 7 (position of /dev/null)
rx.pos(0); // returns 7 (position of /dev/null)
rx.pos(1); // returns 8 (position of dev)
rx.pos(2); // returns 12 (position of null)
//! [18]
//! [19]
s1 = QRegExp::escape("bingo"); // s1 == "bingo"
s2 = QRegExp::escape("f(x)"); // s2 == "f\\(x\\)"
//! [19]
//! [20]
QRegExp rx("(" + QRegExp::escape(name) +
"|" + QRegExp::escape(alias) + ")");
//! [20]
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