QVector is a dynamically resizable array provided by the Qt library. It is a container that stores a collection of elements, and it can be modified by adding, removing, and accessing its items. The QVector class provides several methods to manipulate the elements, including size, capacity, appending, prepending, inserting, and erasing. The empty method is used to check if the container is empty or not.
Code Examples:
1. Checking if a QVector is empty:
QVector vec; if(vec.empty()) { qDebug() << "The QVector is empty."; } else { qDebug() << "The QVector is not empty."; }
The first example demonstrates how to use the empty method to check if a QVector is empty or not. If the QVector is empty, the program will print a message to the console indicating that the container is empty. Otherwise, the message will say that the container is not empty.
The second example shows how to remove all elements from a QVector using the clear method. The QVector is first populated with three string elements using the append method. We then print the QVector before removing its elements and after removing them to show that the clear method has indeed emptied the container.
Package Library:
The QVector class is part of the QtCore module of the Qt library.
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