contains

Returns whether the deque contains the specified element. Uses the equality function provided in the constructor, or pointer equality if none was provided.

Example:

    var deque = new Deque<string> (GLib.str_equal);
    deque.addLast ("apple");
    assert (deque.contains ("apple"));
    assert (!deque.contains ("banana"));

Parameters:

element

the element to search for.

Returns:

true if the element is found.