!7

p {
  L<S> lines = trimAll(lines(mechList_raw("heise.de 2018/04/20 (raw)")));
  JList list = showList(notEndingWith(".", filter containsSpace(standAloneLines(lines))));
  
  L<S> ops = mechLists_intersect("Operations on lists", "Safe JavaX functions");
  
  addToWindowWithMargin(jcenteredLine(map(ops, func(S op) -> JButton {
    jbutton(op)
  })));
}