Enable/disable editor actions based on available editor windows * libgui/src/m-editor/file-editor.h, libgui/src/m-editor/file-editor.cc (class file_editor): Added remove_bookmark, close_all and close_others actions as class variables. (file_editor::check_actions): New functions. (file_editor::add_file_editor_tab): call check_actions. (file_editor::construct): call check_actions, use new class vars where added. (file_editor::handle_tab_remove_request): call check_actions.

#include <octave/oct.h>

DEFUN_DLD (addtwomatrices, args, , "Add A to B")
{
  int nargin = args.length ();

  if (nargin != 2)
    print_usage ();
  else
    {
      NDArray A = args(0).array_value ();
      NDArray B = args(1).array_value ();
      if (! error_state)
        return octave_value (A + B);
    }

  return octave_value_list ();
}