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
700
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
1.2k
Kotlin コルーチンを 理解しよう 2019 - KotlinFest2019 -
sys1yagi
40
30k
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
1.3k
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
Amazon Aurora のバージョンアップ手法について
smt7174
1
110
Potential EM 制度を始めた理由、そして2年後にやめた理由 - EMConf JP 2025
hoyo
2
1.6k
クラウドサービス事業者におけるOSS
tagomoris
3
970
Helm , Kustomize に代わる !? 次世代 k8s パッケージマネージャー Glasskube 入門 / glasskube-entry
parupappa2929
0
290
PHPで印刷所に入稿できる名札データを作る / Generating Print-Ready Name Tag Data with PHP
tomzoh
0
180
白金鉱業Meetup Vol.17_あるデータサイエンティストのデータマネジメントとの向き合い方
brainpadpr
7
990
Autonomous Database Serverless 技術詳細 / adb-s_technical_detail_jp
oracle4engineer
PRO
17
45k
株式会社EventHub・エンジニア採用資料
eventhub
0
4.3k
OpenID BizDay#17 みんなの銀行による身元確認結果の活用 / 20250219-BizDay17-KYC-minna-no-ginko
oidfj
0
210
Snowflakeの開発・運用コストをApache Icebergで効率化しよう!~機能と活用例のご紹介~
sagara
1
260
わたしのOSS活動
kazupon
2
330
Iceberg Meetup Japan #1 : Iceberg and Databricks
databricksjapan
0
290
Featured
See All Featured
BBQ
matthewcrist
87
9.5k
Scaling GitHub
holman
459
140k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
40
2k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
129
19k
What's in a price? How to price your products and services
michaelherold
244
12k
4 Signs Your Business is Dying
shpigford
182
22k
Designing on Purpose - Digital PM Summit 2013
jponch
117
7.1k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
46
2.3k
Stop Working from a Prison Cell
hatefulcrawdad
267
20k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Into the Great Unknown - MozCon
thekraken
35
1.6k
The Language of Interfaces
destraynor
156
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