src_corelib_tools_qlist.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
QList<int> integerList;
QList<QString> stringList;
 
 
QList<QString> list(200);
 
 
QList<QString> list(200, "Pass");
 
 
if (list[0] == "Liz")
    list[0] = "Elizabeth";
 
 
for (qsizetype i = 0; i < list.size(); ++i) {
    if (list.at(i) == "Alfonso")
        cout << "Found Alfonso at position " << i << endl;
}
 
 
qsizetype i = list.indexOf("Harumi");
if (i != -1)
    cout << "First occurrence of Harumi is at position " << i << endl;
 
 
QList<int> list(10);
int *data = list.data();
for (qsizetype i = 0; i < 10; ++i)
    data[i] = 2 * i;
 
 
QList<QString> list;
list.append("one");
list.append("two");
QString three = "three";
list.append(three);
// list: ["one", "two", "three"]
// three: "three"
 
 
QList<QString> list;
list.append("one");
list.append("two");
QString three = "three";
list.append(std::move(three));
// list: ["one", "two", "three"]
// three: ""
 
 
QList<QString> list{"a", "ccc"};
list.emplace(1, 2, 'b');
// list: ["a", "bb", "ccc"]
 
 
QList<QString> list{"one", "two"};
list.emplaceBack(3, 'a');
qDebug() << list;
// list: ["one", "two", "aaa"]
 
 
QList<QString> list;
auto &ref = list.emplaceBack();
ref = "one";
// list: ["one"]
 
 
QList<QString> list;
list.prepend("one");
list.prepend("two");
list.prepend("three");
// list: ["three", "two", "one"]
 
 
QList<QString> list = {"alpha", "beta", "delta"};
list.insert(2, "gamma");
// list: ["alpha", "beta", "gamma", "delta"]
 
 
QList<double> list = {2.718, 1.442, 0.4342};
list.insert(1, 3, 9.9);
// list: [2.718, 9.9, 9.9, 9.9, 1.442, 0.4342]
 
 
QList<QString> list(3);
list.fill("Yes");
// list: ["Yes", "Yes", "Yes"]
 
list.fill("oh", 5);
// list: ["oh", "oh", "oh", "oh", "oh"]
 
 
QList<QString> list{"A", "B", "C", "B", "A"};
list.indexOf("B");            // returns 1
list.indexOf("B", 1);         // returns 1
list.indexOf("B", 2);         // returns 3
list.indexOf("X");            // returns -1
 
 
QList<QString> list = {"A", "B", "C", "B", "A"};
list.lastIndexOf("B");        // returns 3
list.lastIndexOf("B", 3);     // returns 3
list.lastIndexOf("B", 2);     // returns 1
list.lastIndexOf("X");        // returns -1