はじめようきれいなコード

Transcript

1. ͸͡ΊΑ͏
   ͖Ε͍ͳίʔυ @kirimin

2. Α͘ʮྑ͍ίʔυʯͱ͔
   ʮ͖Ε͍ͳίʔυʯͱ͔͍͏
   ݴ༿ΛݟΔ͚Ͳ

3. ಉ͡ॲཧΛ͢ΔϓϩάϥϜʹ
   ͦΜͳҧ͍ͳΜͯ͋Δͷ͔ͳʁ

4. ͋ΔΑ

5. ͖Ε͍ͳίʔυͷఆٛ ͖Ε͍ͳσʔλઃܭ ͖Ε͍ͳΞʔΩςΫνϟઃܭ ͖Ε͍ͳΫϥεઃܭ ͖Ε͍ͳؔ਺ ͖Ε͍ͳॲཧ

6. ͖Ε͍ͳίʔυͷఆٛ ͖Ε͍ͳσʔλઃܭ ͖Ε͍ͳΞʔΩςΫνϟઃܭ ͖Ε͍ͳΫϥεઃܭ ͖Ε͍ͳؔ਺ ͖Ε͍ͳॲཧ ࠓ೔ͷςʔϚ

7. ͖Ε͍ͳॲཧ

8. ྫ୊ w -JTUͷத਎͕B
   C
   DͷॱʹฒΜͰ͍Δ͔Λ ௐ΂Δɻ
   w ਖ਼͚͠Ε͹ʮTVDDFTTʯɺҧ͍ͬͯΕ͹ ʮ'BJMFEʯͱग़ྗ͢Δɻ

9. ྫ୊ public static void main(String[] args) { List<String> list =

   new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; if (list.isEmpty()) { flag = false; } else { if (list.get(0).equals("a")) { if (list.size() > 2) { if (list.get(1).equals("b")) { if (list.size() > 3) { if (list.get(2).equals("c")) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } } else { flag = false; } } flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

10. ໰୊఺ w Πϯσϯτ͕ਂ͍
    w ൑ఆॲཧ͕ແବʹΘ͔Γʹ͍͘
    w ม਺໊͕Θ͔Γʹ͍͘

11. վળͰ͖Δ͔ͳʁ

12. ྫ୊ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; if (list.isEmpty()) { flag = false; } else { if (list.get(0).equals("a")) { if (list.size() > 2) { if (list.get(1).equals("b")) { if (list.size() > 3) { if (list.get(2).equals("c")) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } } else { flag = false; } } flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

13. FMTFʹॲཧ͕ͨ͘͞Μ͋Δ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; if (list.isEmpty()) { flag = false; } else { if (list.get(0).equals("a")) { if (list.size() > 2) { if (list.get(1).equals("b")) { if (list.size() > 3) { if (list.get(2).equals("c")) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } } else { flag = false; } } flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

14. ൑ఆΛٯʹ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; if (!list.isEmpty()) { if (list.get(0).equals("a")) { if (list.size() > 2) { if (list.get(1).equals("b")) { if (list.size() > 3) { if (list.get(2).equals("c")) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } } else { flag = false; } } } else { flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

15. ಉ͡ྲྀΕͳͷʹผʑʹ൑ఆͯ͠Δ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; if (!list.isEmpty()) { if (list.get(0).equals("a")) { if (list.size() > 2) { if (list.get(1).equals("b")) { if (list.size() > 3) { if (list.get(2).equals("c")) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } } else { flag = false; } } } else { flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

16. ൑ఆΛͰ·ͱΊΔ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; if (!list.isEmpty()) { if (list.get(0).equals("a")) { if (list.size() > 2 && list.get(1).equals("b")) { if (list.size() > 3 && list.get(2).equals("c")) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } } else { flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

17. ࠷ॳͷํ΋ಉ͡൑ఆͰΑͦ͞͏ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; if (!list.isEmpty()) { if (list.get(0).equals("a")) { if (list.size() > 2 && list.get(1).equals("b")) { if (list.size() > 3 && list.get(2).equals("c")) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } } else { flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

18. ̏ͭͷ൑ఆʹ̏ͭͷJGจ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; if (!list.isEmpty() && list.get(0).equals("a")) { if (list.size() > 2 && list.get(1).equals("b")) { if (list.size() > 3 && list.get(2).equals("c")) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

19. Ͱ΋͜ͷ൑ఆ͢͜͠෼͔Γʹ͍͘ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; if (!list.isEmpty() && list.get(0).equals("a")) { if (list.size() > 2 && list.get(1).equals("b")) { if (list.size() > 3 && list.get(2).equals("c")) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

20. ม਺ʹ੾Γग़໊ͯ͠લΛ͚ͭͨ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; boolean isFirstA = !list.isEmpty() && list.get(0).equals("a") boolean isSecondB = !list.isEmpty() && list.get(1).equals("b") boolean isThirdC = !list.isEmpty() && list.get(2).equals("c") if (isFirstA) { if (isSecondB) { if (isThirdC) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

21. ͦ΋ͦ΋࣮͸͜ͷJGจ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; boolean isFirstA = !list.isEmpty() && list.get(0).equals("a") boolean isSecondB = !list.isEmpty() && list.get(1).equals("b") boolean isThirdC = !list.isEmpty() && list.get(2).equals("c") if (isFirstA) { if (isSecondB) { if (isThirdC) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

22. ͍Βͳ͍ΜͩΑͶ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean isFirstA = !list.isEmpty() && list.get(0).equals("a") boolean isSecondB = !list.isEmpty() && list.get(1).equals("b") boolean isThirdC = !list.isEmpty() && list.get(2).equals("c") boolean flag = isFirstA && isSecondB && isThirdC; if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

23. CPPMFBOΛͰ൑ఆͯ͠Δ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean isFirstA = !list.isEmpty() && list.get(0).equals("a") boolean isSecondB = !list.isEmpty() && list.get(1).equals("b") boolean isThirdC = !list.isEmpty() && list.get(2).equals("c") boolean flag = isFirstA && isSecondB && isThirdC; if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

24. ৑௕ͳͷͰ GMBH Ͱ͍͍ public static void main(String[] args) { List<String>

    list = new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean isFirstA = !list.isEmpty() && list.get(0).equals("a") boolean isSecondB = !list.isEmpty() && list.get(1).equals("b") boolean isThirdC = !list.isEmpty() && list.get(2).equals("c") boolean flag = isFirstA && isSecondB && isThirdC; if (flag) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

25. ͦ΋ͦ΋͜ͷGMBH໊ͬͯલ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean isFirstA = !list.isEmpty() && list.get(0).equals("a") boolean isSecondB = !list.isEmpty() && list.get(1).equals("b") boolean isThirdC = !list.isEmpty() && list.get(2).equals("c") boolean flag = isFirstA && isSecondB && isThirdC; if (flag) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

26. ҙຯͷΘ͔Δ໊લΛ͚ͭΑ͏ public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean isFirstA = !list.isEmpty() && list.get(0).equals("a") boolean isSecondB = !list.isEmpty() && list.get(1).equals("b") boolean isThirdC = !list.isEmpty() && list.get(2).equals("c") boolean isABC = isFirstA && isSecondB && isThirdC; if (isABC) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

27. Έ͘Β΂Δ

28. CFGPSF public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean flag; if (list.isEmpty()) { flag = false; } else { if (list.get(0).equals("a")) { if (list.size() > 2) { if (list.get(1).equals("b")) { if (list.size() > 3) { if (list.get(2).equals("c")) { flag = true; } else { flag = false; } } else { flag = false; } } else { flag = false; } } else { flag = false; } } flag = false; } if (flag == true) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

29. BGUFS public static void main(String[] args) { List<String> list =

    new ArrayList<>(); list.add("a"); list.add("b"); list.add("c"); boolean isFirstA = !list.isEmpty() && list.get(0).equals("a") boolean isSecondB = !list.isEmpty() && list.get(1).equals("b") boolean isThirdC = !list.isEmpty() && list.get(2).equals("c") boolean isABC = isFirstA && isSecondB && isThirdC; if (isABC) { System.out.println("Success!!!"); } else { System.out.println("Failed!!!"); } }

30. ݁Ռ͸͔Θͬͯͳ͍͚Ͳ
    ͘͢͝Θ͔Γ΍͘͢ͳͬͨ

31. Θ͔Γ΍͍͢
    ʹ
    มߋ͠΍͍͢
    όάΛ࡞Γʹ͍͘
    ͸΍͘ॻ͚Δ

32. ͔͍͍ͬ͜ϓϩάϥϚ
    ʹ
    ೉ͦ͠͏ͳίʔυΛॻ͘ʁ

33. ͔͍͍ͬ͜ϓϩάϥϚ
    ʹ
    Θ͔Γ΍͍͢ίʔυΛॻ͘ʂ

34. Θ͔Γ΍͍͢ίʔυΛॻ͜͏ʂ