anchor.diff:    try erlang:list_to_integer(String) catch error:_Ex -> 0 end.
   
   numValid(E, Num) ->
  -  (Num > 0) and (Num =< lineCount(E)).
  +  (Num > 0) and (Num =< sendRecv(E, lineCount)).
   
   getcmd(E) ->
     L = chomp(io:get_line(prompt())),
  
positive.code:          append(Pid)
    end.
  
  
  test() ->
    E = start(),
    [] = list(E),
    ok.
  
  unknown() ->
  
negative.code:   after 2000 -> timeout
    end.
  
  append(Pid) ->
    L = io:get_line(""),
    case L of
  