iterator Class

Class iterator is declared in class QJsonArray.

The QJsonArray::iterator class provides an STL-style non-const iterator for QJsonArray. More...

Public Types

Detailed Description

QJsonArray::iterator allows you to iterate over a QJsonArray and to modify the array item associated with the iterator. If you want to iterate over a const QJsonArray, use QJsonArray::const_iterator instead. It is generally a good practice to use QJsonArray::const_iterator on a non-const QJsonArray as well, unless you need to change the QJsonArray through the iterator. Const iterators are slightly faster and improves code readability.

The default QJsonArray::iterator constructor creates an uninitialized iterator. You must initialize it using a QJsonArray function like QJsonArray::begin(), QJsonArray::end(), or QJsonArray::insert() before you can start iterating.

Most QJsonArray functions accept an integer index rather than an iterator. For that reason, iterators are rarely useful in connection with QJsonArray. One place where STL-style iterators do make sense is as arguments to generic algorithms.

Multiple iterators can be used on the same array. However, be aware that any non-const function call performed on the QJsonArray will render all existing iterators undefined.

See also QJsonArray::const_iterator.

Member Type Documentation

typedef iterator::iterator_category

A synonym for std::random_access_iterator_tag indicating this iterator is a random access iterator.