filter

Returns a new ArrayList containing only the elements that match the given predicate.

Example:

    var list = new ArrayList<string> (GLib.str_equal);
    list.add ("apple");
    list.add ("banana");
    var a_words = list.filter ((s) => { return s.has_prefix ("a"); });
    assert (a_words.size () == 1);

Parameters:

func	the predicate to test each element.

Returns:

a new ArrayList with matching elements.