筋肉kt.pdf

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1. 1.

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2. 2.

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3. 3.

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4. 4.

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5. 5.

   Copyright © ZOZO Technologies, Inc. All Right Reserved. ,PUMJO
   1B[[MFSTͱ͸ʁ Kotlin

   ConfͰൃද͞ΕͨʮKotlinΫΠζʯΈ͍ͨͳ΋ͷ https://www.youtube.com/watch?v=Xq9vBZs0j-8
6. 6.

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   1B[[MFSTͱ͸ʁ ιʔείʔυͱղઆ͸ԼهͷϦϙδτϦʹ͋Δ

   https://github.com/angryziber/kotlin-puzzlers
7. 7.

   Copyright © ZOZO Technologies, Inc. All Right Reserved. ͬͦ͘͞໰୊ߦͧ͘ʂʂʂ Έͳ͞Μ΋Ұॹʹߟ͑ͯΈ·͠ΐ͏ʂ

8. 8.

   Copyright © ZOZO Technologies, Inc. All Right Reserved. ୈ̍໰

9. 9.

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11. 11.

    Copyright © ZOZO Technologies, Inc. All Right Reserved. ୈ̍໰
    ղઆ ਖ਼ղ͸

    d) Will not compile a -> A ɺ b -> Bɺ c -> bar ͱͨ͠ͱ͖ʹɺ foo(bar<A, B> b)
12. 12.

    Copyright © ZOZO Technologies, Inc. All Right Reserved. ୈ̍໰
    ղઆ ਖ਼ղ͸

    d) Will not compile a -> A ɺ b -> Bɺ c -> bar ͱͨ͠ͱ͖ʹɺ foo(bar<A, B> b) ͻͱͭͷFunction(ؔ਺)ͱͯ͠ධՁ͞ΕΔ
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    ղઆ ίϯύΠϧΛ௨͢ʹ͸

    foo((c < a), b > d)
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17. 17.

    Copyright © ZOZO Technologies, Inc. All Right Reserved. ୈ̎໰
    ղઆ nameͱ͍͏ม਺ʹσʔλ͕ೖΔલʹɺ

    logo͕ධՁ͞ΕΔ͔Βɻ KotlinΫϥεΛ Object Kotlin ʹ͢Δͱಈ͘ ਖ਼ղ͸ b) NullPointerException
18. 18.

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19. 19.

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20. 20.

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21. 21.

    Copyright © ZOZO Technologies, Inc. All Right Reserved. ୈ໰
    ղઆ ɾprintln

    ͸ݺͼग़͞Εͨॠؒग़ྗ͞ΕΔ ɾVoid ϝιου͸ Unit Λฦ͢ ɾUnit ͸ γϯάϧτϯͰɺ౳͍͠ͱ൑ఆ͞ΕΔ ɾҰ൪֎ͷ print ͕࣮ߦ͞ΕΔલʹ return false͞ΕΔ ਖ਼ղ͸ a) HelloWorld
22. 22.

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23. 23.

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25. 25.

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    ղઆ ઌʹ੺ͷ৭͕ධՁ͞ΕΔɻ

    val sum = x?:0 + y ਖ਼ղ͸ c)2
26. 26.

    Copyright © ZOZO Technologies, Inc. All Right Reserved. ୈ໰
    ղઆ ઌʹ੺ͷ৭͕ධՁ͞ΕΔɻ

    val sum = x?:0 + y ܭࢉॲཧͨ݁͠ՌΛnull͔Ͳ͏͔൑ఆ͢Δ(ΤϧϏεԋࢉࢠ) val sum = x?: 3
27. 27.

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28. 28.

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    ͥͻ࠙਌ձͰ͓࿩͠·͠ΐ͏ʂʂ