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-rw-r--r--doc/src/snippets/qstring/main.cpp997
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diff --git a/doc/src/snippets/qstring/main.cpp b/doc/src/snippets/qstring/main.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
-** the names of its contributors may be used to endorse or promote
-** products derived from this software without specific prior written
-** permission.
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <QtGui>
-#include <QApplication>
-#include <stdio.h>
-
-class Widget : public QWidget
-{
-public:
- Widget(QWidget *parent = 0);
-
- void constCharPointer();
- void constCharArray();
- void characterReference();
- void atFunction();
- void stringLiteral();
- void modify();
- void index();
- QString boolToString(bool b);
- void nullVsEmpty();
-
- void appendFunction();
- void argFunction();
- void chopFunction();
- void compareFunction();
- void compareSensitiveFunction();
- void containsFunction();
- void countFunction();
- void dataFunction();
- void endsWithFunction();
- void fillFunction();
- void fromRawDataFunction();
-
- void indexOfFunction();
- void firstIndexOfFunction();
- void insertFunction();
- void isNullFunction();
- void isEmptyFunction();
- void lastIndexOfFunction();
- void leftFunction();
- void leftJustifiedFunction();
- void leftRefFunction();
- void midFunction();
- void midRefFunction();
- void numberFunction();
-
- void prependFunction();
- void removeFunction();
- void replaceFunction();
- void reserveFunction();
- void resizeFunction();
- void rightFunction();
- void rightJustifiedFunction();
- void rightRefFunction();
- void sectionFunction();
- void setNumFunction();
- void simplifiedFunction();
-
- void sizeFunction();
- void splitFunction();
- void splitCaseSensitiveFunction();
- void sprintfFunction();
- void startsWithFunction();
- void toDoubleFunction();
- void toFloatFunction();
- void toIntFunction();
- void toLongFunction();
- void toLongLongFunction();
-
- void toLowerFunction();
- void toShortFunction();
- void toUIntFunction();
- void toULongFunction();
- void toULongLongFunction();
- void toUShortFunction();
- void toUpperFunction();
- void trimmedFunction();
- void truncateFunction();
-
- void plusEqualOperator();
- void arrayOperator();
-};
-
-Widget::Widget(QWidget *parent)
- : QWidget(parent)
-{
-}
-
-void Widget::constCharPointer()
-{
- //! [0]
- QString str = "Hello";
- //! [0]
-}
-
-void Widget::constCharArray()
-{
- //! [1]
- static const QChar data[4] = { 0x0055, 0x006e, 0x10e3, 0x03a3 };
- QString str(data, 4);
- //! [1]
-}
-
-void Widget::characterReference()
-{
- //! [2]
- QString str;
- str.resize(4);
-
- str[0] = QChar('U');
- str[1] = QChar('n');
- str[2] = QChar(0x10e3);
- str[3] = QChar(0x03a3);
- //! [2]
-}
-
-void Widget::atFunction()
-{
- //! [3]
- QString str;
-
- for (int i = 0; i < str.size(); ++i) {
- if (str.at(i) >= QChar('a') && str.at(i) <= QChar('f'))
- qDebug() << "Found character in range [a-f]";
- }
- //! [3]
-}
-
-void Widget::stringLiteral()
-{
- //! [4]
- QString str;
-
- if (str == "auto" || str == "extern"
- || str == "static" || str == "register") {
- // ...
- }
- //! [4]
-}
-
-void Widget::modify()
-{
- //! [5]
- QString str = "and";
- str.prepend("rock "); // str == "rock and"
- str.append(" roll"); // str == "rock and roll"
- str.replace(5, 3, "&"); // str == "rock & roll"
- //! [5]
-}
-
-void Widget::index()
-{
- //! [6]
- QString str = "We must be <b>bold</b>, very <b>bold</b>";
- int j = 0;
-
- while ((j = str.indexOf("<b>", j)) != -1) {
- qDebug() << "Found <b> tag at index position" << j;
- ++j;
- }
- //! [6]
-}
-
-//! [7]
-QString Widget::boolToString(bool b)
-{
- QString result;
- if (b)
- result = "True";
- else
- result = "False";
- return result;
-}
-//! [7]
-
-
-void Widget::nullVsEmpty()
-{
- //! [8]
- QString().isNull(); // returns true
- QString().isEmpty(); // returns true
-
- QString("").isNull(); // returns false
- QString("").isEmpty(); // returns true
-
- QString("abc").isNull(); // returns false
- QString("abc").isEmpty(); // returns false
- //! [8]
-}
-
-void Widget::appendFunction()
-{
- //! [9]
- QString x = "free";
- QString y = "dom";
-
- x.append(y);
- // x == "freedom"
- //! [9]
-
- //! [10]
- x.insert(x.size(), y);
- //! [10]
-}
-
-void Widget::argFunction()
-{
- //! [11]
- QString i; // current file's number
- QString total; // number of files to process
- QString fileName; // current file's name
-
- QString status = QString("Processing file %1 of %2: %3")
- .arg(i).arg(total).arg(fileName);
- //! [11]
-
- //! [12] //! [13]
- QString str;
- //! [12]
- str = "%1 %2";
-
- str.arg("%1f", "Hello"); // returns "%1f Hello"
- str.arg("%1f").arg("Hello"); // returns "Hellof %2"
- //! [13]
-
- //! [14]
- str = QString("Decimal 63 is %1 in hexadecimal")
- .arg(63, 0, 16);
- // str == "Decimal 63 is 3f in hexadecimal"
-
- QLocale::setDefault(QLocale(QLocale::English, QLocale::UnitedStates));
- str = QString("%1 %L2 %L3")
- .arg(12345)
- .arg(12345)
- .arg(12345, 0, 16);
- // str == "12345 12,345 3039"
- //! [14]
-}
-
-void Widget::chopFunction()
-{
- //! [15]
- QString str("LOGOUT\r\n");
- str.chop(2);
- // str == "LOGOUT"
- //! [15]
-}
-
-void Widget::compareFunction()
-{
- int x = QString::compare("auto", "auto"); // x == 0
- int y = QString::compare("auto", "car"); // y < 0
- int z = QString::compare("car", "auto"); // z > 0
-}
-
-void Widget::compareSensitiveFunction()
-{
- //! [16]
- int x = QString::compare("aUtO", "AuTo", Qt::CaseInsensitive); // x == 0
- int y = QString::compare("auto", "Car", Qt::CaseSensitive); // y > 0
- int z = QString::compare("auto", "Car", Qt::CaseInsensitive); // z < 0
- //! [16]
-}
-
-void Widget::containsFunction()
-{
- //! [17]
- QString str = "Peter Pan";
- str.contains("peter", Qt::CaseInsensitive); // returns true
- //! [17]
-}
-
-void Widget::countFunction()
-{
- //! [18]
- QString str = "banana and panama";
- str.count(QRegExp("a[nm]a")); // returns 4
- //! [18]
-
- //! [95]
- QString str = "banana and panama";
- str.count(QRegularExpression("a[nm]a")); // returns 4
- //! [95]
-}
-
-void Widget::dataFunction()
-{
- //! [19]
- QString str = "Hello world";
- QChar *data = str.data();
- while (!data->isNull()) {
- qDebug() << data->unicode();
- ++data;
- }
- //! [19]
-}
-
-void Widget::endsWithFunction()
-{
- //! [20]
- QString str = "Bananas";
- str.endsWith("anas"); // returns true
- str.endsWith("pple"); // returns false
- //! [20]
-}
-
-void Widget::fillFunction()
-{
- //! [21]
- QString str = "Berlin";
- str.fill('z');
- // str == "zzzzzz"
-
- str.fill('A', 2);
- // str == "AA"
- //! [21]
-}
-
-void Widget::fromRawDataFunction()
-{
- //! [22]
- QRegExp pattern;
- static const QChar unicode[] = {
- 0x005A, 0x007F, 0x00A4, 0x0060,
- 0x1009, 0x0020, 0x0020};
- int size = sizeof(unicode) / sizeof(QChar);
-
- QString str = QString::fromRawData(unicode, size);
- if (str.contains(QRegExp(pattern))) {
- // ...
- //! [22] //! [23]
- }
- //! [23]
-}
-
-void Widget::indexOfFunction()
-{
- //! [24]
- QString x = "sticky question";
- QString y = "sti";
- x.indexOf(y); // returns 0
- x.indexOf(y, 1); // returns 10
- x.indexOf(y, 10); // returns 10
- x.indexOf(y, 11); // returns -1
- //! [24]
-}
-
-void Widget::firstIndexOfFunction()
-{
- //! [25]
- QString str = "the minimum";
- str.indexOf(QRegExp("m[aeiou]"), 0); // returns 4
- //! [25]
-
- //! [93]
- QString str = "the minimum";
- str.indexOf(QRegularExpression("m[aeiou]"), 0); // returns 4
- //! [93]
-}
-
-void Widget::insertFunction()
-{
- //! [26]
- QString str = "Meal";
- str.insert(1, QString("ontr"));
- // str == "Montreal"
- //! [26]
-}
-
-void Widget::isEmptyFunction()
-{
- //! [27]
- QString().isEmpty(); // returns true
- QString("").isEmpty(); // returns true
- QString("x").isEmpty(); // returns false
- QString("abc").isEmpty(); // returns false
- //! [27]
-}
-
-void Widget::isNullFunction()
-{
- //! [28]
- QString().isNull(); // returns true
- QString("").isNull(); // returns false
- QString("abc").isNull(); // returns false
- //! [28]
-}
-
-void Widget::lastIndexOfFunction()
-{
- //! [29]
- QString x = "crazy azimuths";
- QString y = "az";
- x.lastIndexOf(y); // returns 6
- x.lastIndexOf(y, 6); // returns 6
- x.lastIndexOf(y, 5); // returns 2
- x.lastIndexOf(y, 1); // returns -1
- //! [29]
-
- //! [30]
- QString str = "the minimum";
- str.lastIndexOf(QRegExp("m[aeiou]")); // returns 8
- //! [30]
-
- //! [94]
- QString str = "the minimum";
- str.lastIndexOf(QRegularExpression("m[aeiou]")); // returns 8
- //! [94]
-}
-
-void Widget::leftFunction()
-{
- //! [31]
- QString x = "Pineapple";
- QString y = x.left(4); // y == "Pine"
- //! [31]
-}
-
-void Widget::leftJustifiedFunction()
-{
- //! [32]
- QString s = "apple";
- QString t = s.leftJustified(8, '.'); // t == "apple..."
- //! [32]
-
- //! [33]
- QString str = "Pineapple";
- str = str.leftJustified(5, '.', true); // str == "Pinea"
- //! [33]
-}
-
-void Widget::midFunction()
-{
- //! [34]
- QString x = "Nine pineapples";
- QString y = x.mid(5, 4); // y == "pine"
- QString z = x.mid(5); // z == "pineapples"
- //! [34]
-}
-
-void Widget::numberFunction()
-{
- //! [35]
- long a = 63;
- QString s = QString::number(a, 16); // s == "3f"
- QString t = QString::number(a, 16).toUpper(); // t == "3F"
- //! [35]
-}
-
-void Widget::prependFunction()
-{
- //! [36]
- QString x = "ship";
- QString y = "air";
- x.prepend(y);
- // x == "airship"
- //! [36]
-}
-
-void Widget::removeFunction()
-{
- //! [37]
- QString s = "Montreal";
- s.remove(1, 4);
- // s == "Meal"
- //! [37]
-
- //! [38]
- QString t = "Ali Baba";
- t.remove(QChar('a'), Qt::CaseInsensitive);
- // t == "li Bb"
- //! [38]
-
- //! [39]
- QString r = "Telephone";
- r.remove(QRegExp("[aeiou]."));
- // r == "The"
- //! [39]
-
- //! [96]
- QString r = "Telephone";
- r.remove(QRegularExpression("[aeiou]."));
- // r == "The"
- //! [96]
-}
-
-void Widget::replaceFunction()
-{
- //! [40]
- QString x = "Say yes!";
- QString y = "no";
- x.replace(4, 3, y);
- // x == "Say no!"
- //! [40]
-
- //! [41]
- QString str = "colour behaviour flavour neighbour";
- str.replace(QString("ou"), QString("o"));
- // str == "color behavior flavor neighbor"
- //! [41]
-
- //! [42]
- QString s = "Banana";
- s.replace(QRegExp("a[mn]"), "ox");
- // s == "Boxoxa"
- //! [42]
-
- //! [43]
- QString t = "A <i>bon mot</i>.";
- t.replace(QRegExp("<i>([^<]*)</i>"), "\\emph{\\1}");
- // t == "A \\emph{bon mot}."
- //! [43]
-
- //! [86]
- QString equis = "xxxxxx";
- equis.replace("xx", "x");
- // equis == "xxx"
- //! [86]
-
- //! [87]
- QString s = "Banana";
- s.replace(QRegularExpression("a[mn]"), "ox");
- // s == "Boxoxa"
- //! [87]
-
- //! [88]
- QString t = "A <i>bon mot</i>.";
- t.replace(QRegularExpression("<i>([^<]*)</i>"), "\\emph{\\1}");
- // t == "A \\emph{bon mot}."
- //! [88]
-}
-
-void Widget::reserveFunction()
-{
- //! [44]
- QString result;
- int maxSize;
- bool condition;
- QChar nextChar;
-
- result.reserve(maxSize);
-
- while (condition)
- result.append(nextChar);
-
- result.squeeze();
- //! [44]
-}
-
-void Widget::resizeFunction()
-{
- //! [45]
- QString s = "Hello world";
- s.resize(5);
- // s == "Hello"
-
- s.resize(8);
- // s == "Hello???" (where ? stands for any character)
- //! [45]
-
- //! [46]
- QString t = "Hello";
- t += QString(10, 'X');
- // t == "HelloXXXXXXXXXX"
- //! [46]
-
- //! [47]
- QString r = "Hello";
- r = r.leftJustified(10, ' ');
- // r == "Hello "
- //! [47]
-}
-
-void Widget::rightFunction()
-{
- //! [48]
- QString x = "Pineapple";
- QString y = x.right(5); // y == "apple"
- //! [48]
-}
-
-void Widget::rightJustifiedFunction()
-{
- //! [49]
- QString s = "apple";
- QString t = s.rightJustified(8, '.'); // t == "...apple"
- //! [49]
-
- //! [50]
- QString str = "Pineapple";
- str = str.rightJustified(5, '.', true); // str == "Pinea"
- //! [50]
-}
-
-void Widget::sectionFunction()
-{
- //! [51] //! [52]
- QString str;
- //! [51]
- QString csv = "forename,middlename,surname,phone";
- QString path = "/usr/local/bin/myapp"; // First field is empty
- QString::SectionFlag flag = QString::SectionSkipEmpty;
-
-
- str = csv.section(',', 2, 2); // str == "surname"
- str = path.section('/', 3, 4); // str == "bin/myapp"
- str = path.section('/', 3, 3, flag); // str == "myapp"
- //! [52]
-
- //! [53]
- str = csv.section(',', -3, -2); // str == "middlename,surname"
- str = path.section('/', -1); // str == "myapp"
- //! [53]
-
- //! [54]
- QString data = "forename**middlename**surname**phone";
-
- str = data.section("**", 2, 2); // str == "surname"
- str = data.section("**", -3, -2); // str == "middlename**surname"
- //! [54]
-
- //! [55]
- QString line = "forename\tmiddlename surname \t \t phone";
- QRegExp sep("\\s+");
- str = line.section(sep, 2, 2); // str == "surname"
- str = line.section(sep, -3, -2); // str == "middlename surname"
- //! [55]
-
- //! [89]
- QString line = "forename\tmiddlename surname \t \t phone";
- QRegularExpression sep("\\s+");
- str = line.section(sep, 2, 2); // str == "surname"
- str = line.section(sep, -3, -2); // str == "middlename surname"
- //! [89]
-}
-
-void Widget::setNumFunction()
-{
- //! [56]
- QString str;
- str.setNum(1234); // str == "1234"
- //! [56]
-}
-
-void Widget::simplifiedFunction()
-{
- //! [57]
- QString str = " lots\t of\nwhitespace\r\n ";
- str = str.simplified();
- // str == "lots of whitespace";
- //! [57]
-}
-
-void Widget::sizeFunction()
-{
- //! [58]
- QString str = "World";
- int n = str.size(); // n == 5
- str.data()[0]; // returns 'W'
- str.data()[4]; // returns 'd'
- str.data()[5]; // returns '\0'
- //! [58]
-}
-
-void Widget::splitFunction()
-{
- //! [59]
- QString str;
- QStringList list;
-
- str = "Some text\n\twith strange whitespace.";
- list = str.split(QRegExp("\\s+"));
- // list: [ "Some", "text", "with", "strange", "whitespace." ]
- //! [59]
-
- //! [60]
- str = "This time, a normal English sentence.";
- list = str.split(QRegExp("\\W+"), QString::SkipEmptyParts);
- // list: [ "This", "time", "a", "normal", "English", "sentence" ]
- //! [60]
-
- //! [61]
- str = "Now: this sentence fragment.";
- list = str.split(QRegExp("\\b"));
- // list: [ "", "Now", ": ", "this", " ", "sentence", " ", "fragment", "." ]
- //! [61]
-
- //! [90]
- QString str;
- QStringList list;
-
- str = "Some text\n\twith strange whitespace.";
- list = str.split(QRegularExpression("\\s+"));
- // list: [ "Some", "text", "with", "strange", "whitespace." ]
- //! [90]
-
- //! [91]
- str = "This time, a normal English sentence.";
- list = str.split(QRegularExpression("\\W+"), QString::SkipEmptyParts);
- // list: [ "This", "time", "a", "normal", "English", "sentence" ]
- //! [91]
-
- //! [92]
- str = "Now: this sentence fragment.";
- list = str.split(QRegularExpression("\\b"));
- // list: [ "", "Now", ": ", "this", " ", "sentence", " ", "fragment", "." ]
- //! [92]
-}
-
-void Widget::splitCaseSensitiveFunction()
-{
- //! [62]
- QString str = "a,,b,c";
-
- QStringList list1 = str.split(",");
- // list1: [ "a", "", "b", "c" ]
-
- QStringList list2 = str.split(",", QString::SkipEmptyParts);
- // list2: [ "a", "b", "c" ]
- //! [62]
-}
-
-void Widget::sprintfFunction()
-{
- //! [63]
- size_t BufSize;
- char buf[BufSize];
-
- ::snprintf(buf, BufSize, "%lld", 123456789LL);
- QString str = QString::fromAscii(buf);
- //! [63]
-
- //! [64]
- QString result;
- QTextStream(&result) << "pi = " << 3.14;
- // result == "pi = 3.14"
- //! [64]
-}
-
-void Widget::startsWithFunction()
-{
- //! [65]
- QString str = "Bananas";
- str.startsWith("Ban"); // returns true
- str.startsWith("Car"); // returns false
- //! [65]
-}
-
-void Widget::toDoubleFunction()
-{
- //! [66]
- QString str = "1234.56";
- double val = str.toDouble(); // val == 1234.56
- //! [66]
-
- //! [67]
- bool ok;
- double d;
-
- d = QString( "1234.56e-02" ).toDouble(&ok); // ok == true, d == 12.3456
- //! [67]
-
- //! [68]
- d = QString( "1234,56" ).toDouble(&ok); // ok == false
- d = QString( "1234.56" ).toDouble(&ok); // ok == true, d == 1234.56
- //! [68]
-
- //! [69]
- d = QString( "1,234,567.89" ).toDouble(&ok); // ok == false
- d = QString( "1234567.89" ).toDouble(&ok); // ok == true
- //! [69]
-}
-
-void Widget::toFloatFunction()
-{
- //! [71]
- QString str1 = "1234.56";
- str1.toFloat(); // returns 1234.56
-
- bool ok;
- QString str2 = "R2D2";
- str2.toFloat(&ok); // returns 0.0, sets ok to false
- //! [71]
-}
-
-void Widget::toIntFunction()
-{
- //! [72]
- QString str = "FF";
- bool ok;
- int hex = str.toInt(&ok, 16); // hex == 255, ok == true
- int dec = str.toInt(&ok, 10); // dec == 0, ok == false
- //! [72]
-}
-
-void Widget::toLongFunction()
-{
- //! [73]
- QString str = "FF";
- bool ok;
-
- long hex = str.toLong(&ok, 16); // hex == 255, ok == true
- long dec = str.toLong(&ok, 10); // dec == 0, ok == false
- //! [73]
-}
-
-void Widget::toLongLongFunction()
-{
- //! [74]
- QString str = "FF";
- bool ok;
-
- qint64 hex = str.toLongLong(&ok, 16); // hex == 255, ok == true
- qint64 dec = str.toLongLong(&ok, 10); // dec == 0, ok == false
- //! [74]
-}
-
-void Widget::toLowerFunction()
-{
- //! [75]
- QString str = "Qt by NOKIA";
- str = str.toLower(); // str == "qt by nokia"
- //! [75]
-}
-
-void Widget::toShortFunction()
-{
- //! [76]
- QString str = "FF";
- bool ok;
-
- short hex = str.toShort(&ok, 16); // hex == 255, ok == true
- short dec = str.toShort(&ok, 10); // dec == 0, ok == false
- //! [76]
-}
-
-void Widget::toUIntFunction()
-{
- //! [77]
- QString str = "FF";
- bool ok;
-
- uint hex = str.toUInt(&ok, 16); // hex == 255, ok == true
- uint dec = str.toUInt(&ok, 10); // dec == 0, ok == false
- //! [77]
-}
-
-void Widget::toULongFunction()
-{
- //! [78]
- QString str = "FF";
- bool ok;
-
- ulong hex = str.toULong(&ok, 16); // hex == 255, ok == true
- ulong dec = str.toULong(&ok, 10); // dec == 0, ok == false
- //! [78]
-}
-
-void Widget::toULongLongFunction()
-{
- //! [79]
- QString str = "FF";
- bool ok;
-
- quint64 hex = str.toULongLong(&ok, 16); // hex == 255, ok == true
- quint64 dec = str.toULongLong(&ok, 10); // dec == 0, ok == false
- //! [79]
-}
-
-void Widget::toUShortFunction()
-{
- //! [80]
- QString str = "FF";
- bool ok;
-
- ushort hex = str.toUShort(&ok, 16); // hex == 255, ok == true
- ushort dec = str.toUShort(&ok, 10); // dec == 0, ok == false
- //! [80]
-}
-
-void Widget::toUpperFunction()
-{
- //! [81]
- QString str = "TeXt";
- str = str.toUpper(); // str == "TEXT"
- //! [81]
-}
-
-void Widget::trimmedFunction()
-{
- //! [82]
- QString str = " lots\t of\nwhitespace\r\n ";
- str = str.trimmed();
- // str == "lots\t of\nwhitespace"
- //! [82]
-}
-
-void Widget::truncateFunction()
-{
- //! [83]
- QString str = "Vladivostok";
- str.truncate(4);
- // str == "Vlad"
- //! [83]
-}
-
-void Widget::plusEqualOperator()
-{
- //! [84]
- QString x = "free";
- QString y = "dom";
- x += y;
- // x == "freedom"
- //! [84]
-}
-
-void Widget::arrayOperator()
-{
- //! [85]
- QString str;
-
- if (str[0] == QChar('?'))
- str[0] = QChar('_');
- //! [85]
-}
-
-void Widget::midRefFunction()
-{
- //! [midRef]
- QString x = "Nine pineapples";
- QStringRef y = x.midRef(5, 4); // y == "pine"
- QStringRef z = x.midRef(5); // z == "pineapples"
- //! [midRef]
-}
-
-void Widget::leftRefFunction()
-{
- //! [leftRef]
- QString x = "Pineapple";
- QStringRef y = x.leftRef(4); // y == "Pine"
- //! [leftRef]
-}
-
-void Widget::rightRefFunction()
-{
- //! [rightRef]
- QString x = "Pineapple";
- QStringRef y = x.rightRef(5); // y == "apple"
- //! [rightRef]
-}
-
-
-int main(int argc, char *argv[])
-{
- QApplication app(argc, argv);
- Widget widget;
- widget.show();
- return app.exec();
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-08 23:27:59 +0000