Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Kotlin学習とライブラリ作成
Search
yagi
March 24, 2016
Technology
1
4.2k
Kotlin学習とライブラリ作成
ライブラリ作成をしながらKotlinを学習するといいんじゃないかなーという話です
yagi
March 24, 2016
Tweet
Share
More Decks by yagi
See All by yagi
医療現場の解像度を上げるために 開発チームが行っている取り組み
sys1yagi
0
750
これどうやって動いてるんだ? Spring Framework/Bootのソースを読む
sys1yagi
1
1.3k
Kotlin コルーチンを 理解しよう 2019 - KotlinFest2019 -
sys1yagi
40
31k
5分でわかるKotlin Coroutines Flow
sys1yagi
21
18k
Androidと非同期処理 とCoroutine1.0.0
sys1yagi
12
14k
Kotlin コルーチンを 理解しよう
sys1yagi
41
24k
アーキテクチャと Scaffolding Template
sys1yagi
8
1.4k
Androidの非同期処理をKotlinコルーチンで行う
sys1yagi
3
23k
解剖Kotlin ~バイトコードを読み解く~
sys1yagi
18
10k
Other Decks in Technology
See All in Technology
Lazy application authentication with Tailscale
bluehatbrit
0
170
無意味な開発生産性の議論から抜け出すための予兆検知とお金とAI
i35_267
3
12k
マネジメントって難しい、けどおもしろい / Management is tough, but fun! #em_findy
ar_tama
7
930
CursorによるPMO業務の代替 / Automating PMO Tasks with Cursor
motoyoshi_kakaku
2
930
成長し続けるアプリのためのテストと設計の関係、そして意思決定の記録。
sansantech
PRO
0
110
赤煉瓦倉庫勉強会「Databricksを選んだ理由と、絶賛真っ只中のデータ基盤移行体験記」
ivry_presentationmaterials
2
340
モバイル界のMCPを考える
naoto33
0
430
プライベートクラウドでの効率的な証明書配布戦略 / Efficient Certificate Distribution Strategy in Private Cloud
lycorptech_jp
PRO
0
110
敢えて生成AIを使わないマネジメント業務
kzkmaeda
2
400
Tech-Verse 2025 Keynote
lycorptech_jp
PRO
0
1.8k
Lufthansa ®️ USA Contact Numbers: Complete 2025 Support Guide
lufthanahelpsupport
0
150
20250707-AI活用の個人差を埋めるチームづくり
shnjtk
4
3.6k
Featured
See All Featured
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
26
2.9k
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
How to train your dragon (web standard)
notwaldorf
94
6.1k
Building Adaptive Systems
keathley
43
2.7k
Optimising Largest Contentful Paint
csswizardry
37
3.3k
Thoughts on Productivity
jonyablonski
69
4.7k
Large-scale JavaScript Application Architecture
addyosmani
512
110k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
50k
Fantastic passwords and where to find them - at NoRuKo
philnash
51
3.3k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
Embracing the Ebb and Flow
colly
86
4.7k
A designer walks into a library…
pauljervisheath
207
24k
Transcript
,PUMJOֶशͱϥΠϒϥϦ࡞ 2016 03 24 @ Sansan Toshihiro Yagi
About Me Toshihiro Yagi Twitter : sys1yagi Programmer at Cookpad
Inc. Android engineer Kotlin2014ॳ಄ลΓ͔ΒŧŔŕŪ৮͍ͬͯΔఔ
Target & Agenda ,PUMJOֶशͷͨΊʹϥΠϒϥϦ࡞ͬͯΈΔͷ݁ ߏ͍͍Μ͡Όͳ͍͔ͳʔͱ͍͏Ͱ͢ɻ LNPDLJUPͱ͍͏ϥΠϒϥϦͱڞʹ࡞࣌ʹͬ ͨ,PUMJOͷػೳͳͲΛհ͠·͢ɻ ,PUMJOͷجຊతͳݴޠͷػೳ͍ͬͯͯ,PUMJO Λͬͯ۩ମతʹͲ͏͍ͬͨࣄ͕Ͱ͖ͦ͏͔ͳ͊ʔ ͱߟ͍͑ͯΔਓ͚
What is kmockito?
Wrapper of Mockito for Kotlin NPDL WBSJUFN*UFNNPDL XIFO JUFNMFOHUI
JOWPLFEUIFO3FUVSO BOTXFS JUFNTPNF.FUIPE BOZ*OU BOZ4USJOH BOZ BOZ JOWPLFE UIFO"OTXFS\ WBM B C D E JUBSHVNFOUT*OU 4USJOH *UFN /BNF EPTPNFUIJOH ^ WFSJGZ JUFNWFSJGZ UJNFT MFOHUI https://github.com/sys1yagi/kmockito
Motivation
bXIFO`,PUMJOͷ༧ޠ WBMJUFNNPDL *UFNDMBTTKBWB AXIFOA JUFNMFOHUI UIFO3FUVSO ༧ޠͱඃΒͳ͍Α͏ʹΤεέʔϓ͕ඞཁ
BOZ ͕OVMMΛฦ͢ AXIFOA JUFNMFOHUI BOZ UIFO3FUVSO ʜ any() return null
and cause runtime error GVOMFOHUI UFYU4USJOH *OU\ʜ^ Non-Null
Yes kmockito!
Using features of Kotlin top-level extensions inline and reified Extension
Properties Destructuring Declarations
top-level extensions
τοϓϨϕϧʹ͕ؔॻ͚ͯศར
TUBUJDϝιου܈Λ࣋ͭΫϥε͕ੜ͞ΕΔ ֦ுؔ܈XX_extension.ktʹूΊΔͱΑͦ͞͏
lnline & reified
ͳܕͷهड़ΛΊΔ WBMJUFNNPDL *UFNDMBTTKBWB WBMJUFN*UFNNPDL JUFNMFOHUI NPDL
ͳܕͷهड़ΛΊΔ GVO5"OZNPDL .PDLJUPNPDL 5DMBTTKBWB
ͳܕͷهड़ΛΊΔ GVO5"OZNPDL .PDLJUPNPDL 5DMBTTKBWB ܕফڈʹΑͬͯΤϥʔ
ͳܕͷهड़ΛΊΔ GVO5"OZNPDL .PDLJUPNPDL 5DMBTTKBWB ܕফڈʹΑͬͯΤϥʔ JOMJOFGVOSFJpFE5"OZNPDL .PDLJUPNPDL 5DMBTTKBWB
ͳܕͷهड़ΛΊΔ GVO5"OZNPDL .PDLJUPNPDL 5DMBTTKBWB ܕফڈʹΑͬͯΤϥʔ JOMJOFGVOSFJpFE5"OZNPDL .PDLJUPNPDL 5DMBTTKBWB JOMJOFԽͯ͠ܕύϥϝʔλʹSFJpFEΛ༩͢Δͱ5Λ۩ܕͱ͔ͯ͋ͭ͑͠Δ ˞LPUMJOSFqFDU͕ඞཁͰ͢
ͳܕͷهड़ΛΊΔ JOMJOFGVOSFJpFE5"OZNPDL .PDLJUPNPDL 5DMBTTKBWB WBMJUFN*UFNNPDL JUFNMFOHUI NPDL :FT
Extension Properties
ͳϝιουݺͼग़͠ΛΊΔ GVO55JOWPLFE .PDLJUPAXIFOA UIJT JUFNMFOHUI JOWPLFE UIFO3FUVSO
ͳϝιουݺͼग़͠ΛΊΔ GVO55JOWPLFE .PDLJUPAXIFOA UIJT JUFNMFOHUI JOWPLFE UIFO3FUVSO ͳͯ͘Α͘ͳ͍ʁ
ͳϝιουݺͼग़͠ΛΊΔ GVO55JOWPLFE .PDLJUPAXIFOA UIJT WBM55JOWPLFE0OHPJOH4UVCCJOH5 HFU JOWPLFE ɾ&YUFOTJPO1SPQFSUJFTͰҙͷΫϥεʹϓϩύςΟΛ༩͢Δ ɾϓϩύςΟΞΫηε࣌ʹϝιουݺͼग़͠
ͳϝιουݺͼग़͠ΛΊΔ GVO55JOWPLFE .PDLJUPAXIFOA UIJT WBM55JOWPLFE0OHPJOH4UVCCJOH5 HFU JOWPLFE ɾ&YUFOTJPO1SPQFSUJFTͰҙͷΫϥεʹϓϩύςΟΛ༩͢Δ ɾϓϩύςΟΞΫηε࣌ʹϝιουݺͼग़͠
JUFNMFOHUI JOWPLFEUIFO3FUVSO
Destructuring Declarations
85' JUFNTPNF.FUIPE BOZ*OU BOZ4USJOH BOZ BOZ JOWPLFE UIFO"OTXFS\ WBMBJUBSHVNFOUT<>BT*OU
WBMCJUBSHVNFOUT<>BT4USJOH WBMDJUBSHVNFOUT<>BT*UFN WBMEJUBSHVNFOUT<>BT/BNF EPTPNFUIJOH ^
%FTUSVDUVSJOH%FDMBSBUJPOT Λͬͨೖ WBM B C 1BJS l)FMMPz Bl)FMMPz
C
%FTUSVDUVSJOH%FDMBSBUJPOT Λͬͨೖ WBM B C 1BJS l)FMMPz Bl)FMMPz
C ಛఆͷϧʔϧʹԊͬͨΫϥεͰ %FTUSVDUVSJOH%FDMBSBUJPOT͕͑Δɻ
%FTUSVDUVSJOH%FDMBSBUJPOTͷϧʔϧ DMBTT'PP\ PQFSBUPSGVODPNQPOFOU 4USJOHʜ PQFSBUPSGVODPNQPOFOU *OUʜ PQFSBUPSGVODPNQPOFOU/ 5ʜ ^ GVOEP4PNFUIJOH
GPP'PP \ WBM B C GPP ʜ ^ DPNQPOFOU/ ͱ͍͏ϝιουΛඞཁͳ͚ͩ࣋ͭ
%BUB$MBTTͰએݴָʑ EBUBDMBTT'PP WBMB4USJOH WBMC*OU GVOEP4PNFUIJOH GPP'PP \ WBM B C
GPP ʜ ^ %BUB$MBTTͰলུՄೳ
*OWPDBUJPO0O.PDLʹϝιουΛՃ JOMJOFGVOSFJpFE" SFJpFE# SFJpFE$ *OWPDBUJPO0O.PDLBSHVNFOUT 5SJQMF BSHVNFOUT<>BT" BSHVNFOUT<>BT# BSHVNFOUT<>BT$
*OWPDBUJPO0O.PDLʹϝιουΛՃ JOMJOFGVOSFJpFE" SFJpFE# SFJpFE$ *OWPDBUJPO0O.PDLBSHVNFOUT 5SJQMF BSHVNFOUT<>BT" BSHVNFOUT<>BT# BSHVNFOUT<>BT$
JUFNTPNF.FUIPE BOZ*OU BOZ4USJOH BOZ JOWPLFE UIFO"OTXFS\ WBM B C D JUBSHVNFOUT*OU 4USJOH *UFN EPTPNFUIJOH ^ :FT
Conclusion
,PUMJOֶशͱϥΠϒϥϦ࡞ ߦఔͰ݁ߏ͑Δͷ͕࡞ΕΔ ϥΠϒϥϦͩͱ"OESPJEͳͲͷϑϨʔϜϫʔΫ ʹ͋·ΓറΒΕͣॻ͚ΔͷͰֶश͕͔ͲΔ େମίʔυ͕ճ͘Β͍ม͢ΔɻͦͷதͰ,PUMJO ͷ༷ػೳॻ͖ํͳͲʹ͍ͭͯ৭ʑͱ۷ΕΔ ࠷ѱࣺͯΒΕΔ
Let’s Enjoy Kotlin life ϥΠϒϥϦΛ࡞ͬͯ
͓·͚
ಉ͡Α͏ͳϥΠϒϥϦཚཱ ͏ʔΜͲ͏ͨ͠ͷ͔
"XFTPNFLPUMJO ͜͜ʹೖΓ͍ͨ https://github.com/JavaBy/awesome-kotlin
ؤுΖ͏