=====swap=====
Syntax:

<code>
    #include <deque>
    void swap( deque& from );
</code>

The swap() function exchanges the elements of the current deque with those of
from. This function operates in [[/complexity|constant time]].

For example, the following code uses the swap() function to exchange the values
of two deques:

<code>
    deque<int> v( 5, 1 );
    deque<int> d( 4, 42 );
    v.swap( d );

    size_t i;
    cout << "v contains: ";
    for( i = 0; i < v.size(); ++i ) cout << v[i] << ' ';
    cout << '\n';

    cout << "d contains: ";
    for( i = 0; i < d.size(); ++i ) cout << d[i] << ' ';
    cout << '\n';

</code>

The above code displays:

<code terminal>
    v contains: 42 42 42 42 
    d contains: 1 1 1 1 1 
</code>


Related Topics: [[insert]], [[deque_operators|operator =]]