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良いコードを書くためにやってみてること3つ.pdf

 良いコードを書くためにやってみてること3つ.pdf

Keisuke kiuchi

October 31, 2018
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  1. ྑ͍ίʔυΛॻͨ͘Ίʹ
    ΍ͬͯΈͯΔ͜ͱͭ
    LJVDIJLFJTVLF
    4IJCVZBBQL

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  2. ໦಺ܒี
    w ৬ۀɿ:ͷ"OESPJEΤϯδχΞ݉ҭࣇύύ
    w झຯͰ࡞ͬͨϞϊɿʮΒ͘ͰΜ "QQ
    ʯɺ

    ʮ$MFBO"SDIJUFDUVSF5FNQMBUF'PS,PUMJO 044
    ʯ
    w Ϟοτʔɿ໌೔ͷࣗ෼ʹ༏͍͠ίʔυΛॻ͘
    w 4/4

    [email protected]
    (JUIVC!LJVDIJLFJTVLF

    [email protected]

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  3. ࠷ۙͷΞΫςΟϏςΟ

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  4. ࠓճͷൃද͸
    كʹΑ͋͘Δ໰୊Λ
    ׂͱΑ͋͘Δख๏Ͱղܾ͠Α͏ͥ
    ͱ͍͏γϯϓϧͳ࿩

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  5. ΞδΣϯμ
    wҙຯͱ੍໿Λදݱ͠Α͏
    wແΛදݱ͠Α͏
    wϨϏϡʔ؍఺ΛγΣΞ͠Α͏

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  6. ҙຯͱ੍໿Λදݱ͠Α͏

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  7. ಥવͰ͕࣭͢໰Ͱ͢
    WBMQIPOF/VN4USJOH
    ͱ͍͏ม਺ΛݟͨΒͲΜͳ஋Λ

    ૝૾͠·͔͢ʁ

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  8. ࣍ͷ࣭໰
    WBMUFMFQIPOF/VN4USJOH
    ͳΒͲ͏͍͏஋Ͱ͠ΐ͏

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  9. View Slide

  10. ࣅͯΔ͚ͲผͷҙຯΛ࣋ͭม਺
    w QIPOF/VNl9999::::
    w UFMFQIPOF/VNlUFM9999::::z
    ʮΒ͘ͰΜʯͷΞϓϦΑΓҰ෦վѱͯ͠ൈਮ

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  11. EBUBΫϥεJOJUؔ਺Ͱ

    ҙຯͱ੍໿Λදݱ͠Α͏

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  12. UFMFQIPOF/VNCFSJT
    data class TelephoneNumber(val number: String) {
    init {
    if (!number.startsWith(SCHEME)) {
    throw IllegalArgumentException(“error“)
    } else if (number.substring(SCHEME.length)
    .contains(Regex(“.*[^0-9#¥+¥*() -]+.*"))) {
    throw IllegalArgumentException(“error”)
    }
    }
    companion object {
    const val SCHEME = "tel:"
    }
    }
    4$)&.&͔Β

    ࢝·ͬͯΔ͜ͱ
    ಛఆͷਖ਼نදݱΛ

    ຬͨ͢͜ͱ

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  13. QIPOF/VNCFSJT
    class PhoneNumber(val number: String) {
    init {
    if (number.startsWith(TelephoneNumber.SCHEME)) {
    throw IllegalArgumentException(“error")
    } else if ((number.contains(Regex(".*[^0-9#¥+¥*() -]+.*")))) {
    throw IllegalArgumentException(“error")
    }
    }
    }
    4$)&.&͔Β࢝·ͬͯ

    ͍ͳ͍͜ͱ
    ಛఆͷਖ਼نදݱΛ

    ຬͨ͢͜ͱ

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  14. ิ଍JOMJOF$MBTT PSEBUB$MBTT
    w *OMJOFDMBTT ,PUMJOWFSd

    w JOJUϝιουΛ࣋ͯͳ͍ͷͰɺܕ੍໿ͷΈͰे෼ͷ৔߹
    ʹར༻
    w EBUBDMBTT
    w JOJUϝιουΛ࣋ͯΔͰɺܕ੍໿ϩδΧϧͳ੍໿Λ΋
    ͍ͨͤͨ৔߹ʹར༻
    ˞͋͘·Ͱ๻ݸਓͷߟ͑ํͰ͢

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  15. ແΛදݱ͠Α͏

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  16. ࣍ͷ໰୊
    ͋Δ-JTU͔Β৚݅ʹ߹கͨ͠

    ཁૉΛऔΓग़ؔ͢਺Λ࡞Γ͍ͨ

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  17. val contactList = List()
    fun findSameNumberContact(phoneNumber: PhoneNumber):Contact? {
    return contactList.find { it.getPhoneNumber() == phoneNumber }
    }
    ۭͷ-JTU͚ͩͲΩχγφΠσ

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  18. ͍͍Ͷʂ☺

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  19. val contactList = List()
    fun findSameNumberContact(phoneNumber: PhoneNumber):Contact? {
    return contactList.find { it.getPhoneNumber() == phoneNumber }
    }
    Μʁ

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  20. /VMMBCMFͩ

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  21. ແΛදݱ͠Α͏

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  22. val contactList = List()
    fun findSameNumberContact(phoneNumber: PhoneNumber):Contact {
    return contactList.find { it.phoneNumber == phoneNumber } ?:
    Contact.NONE
    }
    data class Contact(val displayName: String, val contactId: String, val
    phoneNumber: PhoneNumber) {
    companion object {
    val NONE = Contact("", "", PhoneNumber(""))
    }
    }
    dddddddddddddddddddddddddddddddddddddddddddddddddddd

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  23. /PO/VMMͰແΛදݱʂ

    ˞ͨͩ͠ɺ/VMMͷ··ʹͨ͠΄͏͕ྑ͍৔߹΋͋ΔͷͰ༻๏༻ྔΛकͬͯ࢖͍·͠ΐ͏

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  24. ิ଍/VMMBCMF PSແΛදݱ
    w ແΛදݱˠ/VMMʹͳΔ͜ͱ͕ਖ਼ৗܥͷൣғ಺ͷ৔߹ྫ֎ॲཧ͕ෆ
    ཁʹͳΔ৔߹
    w ྫ&EJU5FYUʹϢʔβʔ͕ೖྗͨ͠ి࿩൪߸ʹϚον͢Δి࿩൪߸Λ
    pOEͰݟ͚ͭɺి࿩൪߸Λදࣔ͢Δ ݟ͔ͭΒͳ͍ͳΒۭจࣈ

    w /VMMͷ··ˠ/VMMʹͳΔ͜ͱ͕ຊདྷ͋Γ͑ͳ͍৔߹
    w ྫి࿩ாҰཡͰνΣοΫΛೖΕͨ൪߸͚ͩΛpOEͰݟ͚ͭΔ
    ˞͋͘·Ͱ๻ݸਓͷߟ͑ํͰ͢

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  25. ϨϏϡʔ؍఺ΛγΣΞ͠Α͏

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  26. ๭೔ɺ͋Δ13ΛϨϏϡʔ
    ͍ͯͨ࣌͠ͷ͜ͱ

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  27. ࢦఠͨ͠΄͏͕͍͍

    Օॴ͕ଟ͗͢Δ

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  28. ࢦఠ͠ͳ͍Θ͚ʹ΋͍͔ͳ͍͕ɺ
    શ෦ࢦఠ͢Δͷ΋͠ΜͲ͍

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  29. ͳͷͰɺָΛͭͭ͠
    νʔϜٕज़ྗͷ޲্ʹܨ͕Δํ๏
    Λ΍ͬͯΈͨ

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  30. ձٞࣨΛ઎ڌͯ͠

    ϞϒϓϩతϨϏϡʔձΛ࣮ࢪ

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  31. ϞϒϓϩతϨϏϡʔ
    w ࢀՃऀɿ"OESPJE&OHਓɺJ04&OHਓ
    w ୊ࡐɿྫͷ13 ,PUMJO

    w ΍ͬͨ͜ͱɿ

    ࢦఠՕॴΛͲΜͲΜϗϫΠτϘʔυʹॻ͖ग़͢

    Ͳ͏௚ͨ͠΄͏͕͍͍͔ɺΛٞ࿦͢Δ

    ࢦఠΛ൓ө ͔͚ͨͬͨ͠Ͳ࣌ؒͷ౎߹্࣮ݱͤͣ

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  32. ϞϒϓϩతϨϏϡʔ
    ˞ࣾ֎ൿͳͷͰϞβΠΫॲཧͯ͠·͢

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  33. ΍ͬͯΈͨײ৮
    w վΊͯݟͯΈΔͱʮ͜ͷ࣮૷ԿΛҙਤͯ͠ΔΜͩ ʯͬͯͷ͕

    ग़ͯ͘Δ
    w ࢦఠ͞ΕΕ͹౰ͨΓલͱࢥ͑Δ΋ͷ͕ଟ͍
    w ม਺໊ؔ਺໊ͷ໋໊ͷେ੾͞Λ࠶ೝࣝͨ͠
    w ,PUMJOʹ׳Εͯͳ͍ਓ͕ॻ͘ͱ7BS͕ଟ͘ͳΔ

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  34. ϨϏϡʔ؍఺ΛγΣΞͯ͠ɺ

    νʔϜΈΜͳ͕ཧղͰ͖Δ

    ࣮૷Λ৺͕͚Α͏

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  35. ·ͱΊ
    wࣅͨҙຯΛ͚࣋ͭͲҟͳΔม਺

    ˠҙຯͱ੍໿Λදݱ͠Α͏
    wOVMMBCMFΛແ͘͢ํ๏

    ˠແΛදݱ͠Α͏
    wνʔϜͷٕज़ྗ޲্΋݉Ͷͯۮʹ͸

    ϨϏϡʔ؍఺ΛγΣΞ͠Α͏

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  36. ͓ΘΓͰͬ͢ʂ

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