Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Speaker Deck
PRO
Sign in
Sign up
for free
あんまり触れられてない気がする、Kotlin1.3の ありがたい追加機能
yamacraft
November 29, 2018
Technology
0
1.2k
あんまり触れられてない気がする、Kotlin1.3の ありがたい追加機能
2018年11月29日(木)にYahoo LODGEで開催された筋肉.ktの資料です
yamacraft
November 29, 2018
Tweet
Share
More Decks by yamacraft
See All by yamacraft
yamacraft
2
1.6k
yamacraft
2
2.6k
yamacraft
0
4.2k
yamacraft
2
3.8k
yamacraft
0
460
yamacraft
0
650
yamacraft
2
1.5k
yamacraft
0
940
yamacraft
0
320
Other Decks in Technology
See All in Technology
yushiku
3
700
nnstt1
2
120
kota2and3kan
2
370
waka
5
3.1k
hponka
0
1.7k
recruitengineers
0
250
yasuakiomokawa
0
260
miu_crescent
0
400
surumegohan
1
190
you
0
110
kenya888
1
110
legalforce
PRO
0
190
Featured
See All Featured
jcasabona
8
590
jnunemaker
PRO
40
4.7k
destraynor
222
47k
paulrobertlloyd
73
1.5k
maggiecrowley
10
550
deanohume
294
28k
shpigford
370
42k
chrislema
173
14k
smashingmag
283
47k
chriscoyier
683
180k
aarron
258
36k
morganepeng
95
14k
Transcript
͋Μ·Γ৮ΕΒΕͯͳ͍ ؾ͕͢ΔɺKotlin1.3ͷ ͋Γ͕͍ͨՃػೳ @yamacraft
profile • @yamacraft • Mobile Application Engineer • Freelance /
(private)team Y.G.E. • Getting Over Itɹˠˠˠ • 130↑wins / BestTime 8min
trainingʢonly machineʣ • νΣετϓϨε 70ʙ80kg 4ʙ6rep * 3 • ϩʔσϧτΠυ
65ʙ75kg 4ʙ6rep * 3 • ϓϧμϯ 75kg 4ʙ6rep * 3 • ϨοάϓϨε 125ʙ135kg 4ʙ6rep * 3 • and more
physical https://athletebody.jp/2017/10/31/skill-level-assessment/
trouble • Ϛγϯ͚ͩͩͱѲྗશવ͔ͭͳ͍ • CoC #1͕ด͡ΒΕͳͯ͘ԜΜͩ • όοΫΤΫεςϯγϣϯ͕δϜʹͳ͍ • δϜͷϑϦʔΣΠτκʔϯ͕ڱ͗͢Δ
Kotlin 1.3ͰՃ͞Εͨ ͪΐͬͱخ͍͠ػೳͷհ https://kotlinlang.org/docs/reference/whatsnew13.html
ͦͷલʹ
৽ػೳͷνΣοΫͬͯ Ͳ͏ͬͯ֬ೝ͠·͔͢ʁ
UnitTestͰࢼ͢ͷ͕͓͢͢Ί ※ॾઆ͋Γ·͢
ຊʹΓ·͢
Kotlin 1.3ͰՃ͞Εͨ ͪΐͬͱخ͍͠ػೳͷհ https://kotlinlang.org/docs/reference/whatsnew13.html
RandomAPIͷՃ • kotlin.random.Random͕Ճ͞Εͨ • ཚੜʹjava.util.*Λར༻͠ͳͯ͘ࡁΉΑ͏ ʹͳͬͨ • java.util.Randomಉ༷ʹɺ֤ܕͰग़ྗՄೳ • Kotlin
Native͋ͨΓ͋Γ͕͍ͨͣ
RandomAPIͷՃ
ίϨΫγϣϯܥʹ isNullOrEmpty()ͷՃ • Stringʹ͋ͬͨisNullOrEmpty()͕Collection ListɺmapͳͲͰར༻Մೳʹͳͬͨ • isEmpty()ͳΒલ͔Β͋Γ·ͨ͠ • nullνΣοΫ·ͱΊͯͰ͖ͯେม͋Γ͕͍ͨ
ίϨΫγϣϯܥʹ isNullOrEmpty()ͷՃ
unsignedʢූ߸ͳ͠ʣܕͷ Ճ • UByte … 0ʙ255 • UShort … 0ʙ65535
• UInt … 0ʙ2^32-1 • ULong … 0ʙ2^64-1 • ਓʹΑͬͯϝνϟΫνϟ͋Γ͕͍ͨ…
unsignedʢූ߸ͳ͠ʣܕͷ Ճ
ifEmpty()ɺifBlankͷՃ • if(x.isEmpty){}ͱΒͣʹɺx.ifEmpty{}Ͱۭ ۭന࣌ͷॲཧ͕͍͖ͳΓॻ͚ΔΑ͏ʹͳͬͨ • kotlinΆ͘ͳͬͯ͋Γ͕͍ͨ
ifEmpty()ɺifBlankͷՃ
ଞʹ͍Ζ͍Ζ͋ΔͷͰ νΣοΫͯ͠ΈΑ͏ʂ https://kotlinlang.org/docs/reference/whatsnew13.html
͓͠·͍