How to use QVector as two dimensional array?

Question

How do I declare, initialise, and assign values to a QVector as a 2 dimensional array?

Answer 1

The same way as a std::vector:

QVector< QVector< int > > twoDArray;      // Empty.
QVector< QVector< int > > twoDArray( 2 ); // Contains two int arrays.
twoDArray[0].resize(4);
twoDArray[0][2] = 4;  // Assign to the third element of the first array.
...
etc...