Have you used collection data structures within the Qt library?

Yes, Qt has its own collection data structures, which are widely used instead of standard C++ containers. They are optimized for integration with other Qt components and provide a convenient interface.

Main Qt collections:

• QList<T> — a dynamic array similar to std::vector but with some differences.
• QVector<T> — a more modern dynamic array, preferred in most cases.
• QMap<Key, T> — an associative container implementing a balanced tree (similar to std::map).
• QHash<Key, T> — a hash table for fast key-based access.
• QStringList — a list of strings, convenient for working with text data.

Example of using QVector:

#include <QVector>
#include <QDebug>

int main() {
    QVector<int> numbers = {1, 2, 3, 4, 5};
    numbers.append(6);
    for (int num : numbers) {
        qDebug() << num;
    }
    return 0;
}