5-17 Code improvements (refactoring)

Time 1 h
Web code f32t c578
Difficulty Medium

 

Aufgabe 5.17 Codeverbesserungen (Refactoring)

Diese Aufgabe hat ihren Ursprung in der Programmierung von grafischen Benutzerschnittstellen (GUI = Graphical User Interface). Doch selbst ohne die hier verwendeten Funktionen und Variablen zu kennen(!), sind Sie in der Lage, den Code zu verbessern (engl. refactoring): Fügen Sie eine weitere Subroutine ein, die Sie vier Mal aufrufen.

(Diese Aufgabe soll ohne Computer gelöst werden.)

init()
{
  butt1 := makeButton("OK")
  setCommand(butt1, "OK")
  add(butt1, panel)
  addListener(butt1, myListener)
  butt2 := makeButton("Abbruch")
  setCommand(butt2, "CANCEL")
  add(butt2, panel)
  addListener(butt2, myListener)
  butt3 := makeButton("Zurück")
  setCommand(butt3, "BACK")
  add(butt3, panel)
  addListener(butt3, myListener)
  butt4 := makeButton("Weiter")
  setCommand(butt4, "FORWARD")
  add(butt4, panel)
  addListener(butt4, myListener)
}

 

Exercise 5-17: Code improvements (refactoring)

This task has its origins in the programming of graphical user interfaces (GUI = Graphical User Interface). But even without knowing the functions and variables used here(!), you are able to improve the code (refactoring): Add another subroutine that you call four times.

(This task is to be solved without a computer.)

init()
{
  butt1 := makeButton("OK")
  setCommand(butt1, "OK")
  add(butt1, panel)
  addListener(butt1, myListener)
  butt2 := makeButton("Cancel")
  setCommand(butt2, "CANCEL")
  add(butt2, panel)
  addListener(butt2, myListener)
  butt3 := makeButton("Back")
  setCommand(butt3, "BACK")
  add(butt3, panel)
  addListener(butt3, myListener)
  butt4 := makeButton("Forward")
  setCommand(butt4, "FORWARD")
  add(butt4, panel)
  addListener(butt4, myListener)
}

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