QStringList list = {"apple", "banana", "cherry", "donut", "eggplant", "fig"}; //Filter a QStringList so it only includes strings starting with "b" QStringList filteredList = list.filter("b"); //Filter a QStringList so it only includes strings longer than 5 characters QStringList longStrings = list.filter([](const QString& string) { return string.length() > 5; });In the first example, the filter function is passed a simple regular expression "b", which searches for all string element starting with "b". It will only return "banana" in this case. In the second example, we pass our own filtering function as a lambda expression. It takes a QString as an argument and applies the QString::length() method. All QString elements with a length greater than 5 are returned in this case. To use QStringList and its filter functionality, you must include the