void QuadraticHashTable<HashedObj>::insert( const HashedObj & x )
        {
                // Insert x as active
            int currentPos = findPos( x.portNum );
            if( isActive( currentPos ) )
                return;
            array[ currentPos ] = HashEntry( x.portNum, ACTIVE );

                // Rehash; see Section 5.5
            if( ++currentSize > array.size( ) / 2 )
                rehash( );
        }