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
ESLintとCyclomatic complexityの話
Search
Kenya Hoshi
July 13, 2019
Programming
0
940
ESLintとCyclomatic complexityの話
ESLintを使って、JavaScriptのコード内でCyclomatic complexity(循環的複雑度)が高い箇所を特定するお話です。
Kenya Hoshi
July 13, 2019
Tweet
Share
More Decks by Kenya Hoshi
See All by Kenya Hoshi
Nice to meet you, Deno!
yahooshiken
0
120
コンポーネント管理の失敗とこれからのやっていき💪
yahooshiken
2
870
2019/07/11_POLを支えるProduct teamとmonday.com
yahooshiken
1
88
採用活動は究極のオンボーディングである
yahooshiken
1
990
エンジニアインターンが考えるマネジメントキャリアパス
yahooshiken
1
1.8k
Other Decks in Programming
See All in Programming
What Spring Developers Should Know About Jakarta EE
ivargrimstad
0
470
AIと”コードの評価関数”を共有する / Share the "code evaluation function" with AI
euglena1215
1
160
ふつうの技術スタックでアート作品を作ってみる
akira888
1
830
“いい感じ“な定量評価を求めて - Four Keysとアウトカムの間の探求 -
nealle
1
10k
PHPでWebSocketサーバーを実装しよう2025
kubotak
0
280
WebViewの現在地 - SwiftUI時代のWebKit - / The Current State Of WebView
marcy731
0
120
明示と暗黙 ー PHPとGoの インターフェイスの違いを知る
shimabox
2
510
High-Level Programming Languages in AI Era -Human Thought and Mind-
hayat01sh1da
PRO
0
770
A full stack side project webapp all in Kotlin (KotlinConf 2025)
dankim
0
120
NPOでのDevinの活用
codeforeveryone
0
830
VS Code Update for GitHub Copilot
74th
2
640
「Cursor/Devin全社導入の理想と現実」のその後
saitoryc
0
820
Featured
See All Featured
Unsuck your backbone
ammeep
671
58k
Six Lessons from altMBA
skipperchong
28
3.9k
Why You Should Never Use an ORM
jnunemaker
PRO
58
9.4k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
8
820
Product Roadmaps are Hard
iamctodd
PRO
54
11k
Making Projects Easy
brettharned
116
6.3k
Optimizing for Happiness
mojombo
379
70k
Large-scale JavaScript Application Architecture
addyosmani
512
110k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
Making the Leap to Tech Lead
cromwellryan
134
9.4k
Raft: Consensus for Rubyists
vanstee
140
7k
Imperfection Machines: The Place of Print at Facebook
scottboms
267
13k
Transcript
&4-JOUͱ $ZDMPNBUJDDPNQMFYJUZͷ !ZBIPPTIJLFO 4VTUBJOBCMF'SPOUFOE
ࣗݾհ w ໂᜌ݈)PTIJNVSF,FOZB w !ZBIPPTIJLFO w পߴઐˠେࡕେֶجૅֶ෦ٳֶத w גࣜձࣾ10-ΤϯδχΞ w
Likes:8FC'SPOUFOE 3FBDU 5ZQF4DSJQU &MN )3 4BB4 .BOBHFNFOU
ʮྑ͍ʯίʔυͱʁ ಥવͰ͕͢ʜ
8IBU`Tl$MFBO$PEFz ࢲɺࣗͷίʔυ͕ΤϨΨϯτͰޮྑ͍͜ͱΛΈ·͢ɻ ϩδοΫόά͕ೖΓࠐΈʹ͍͘Α͏ʹ୯७Ͱ͋Δ͖Ͱɺ ґଘੑอक͕༻ҙͱͳΔΑ͏ʹ࠷খݶʹ͖͢Ͱ͋Γɺ ΤϥʔॲཧҰ࿈ͷઓུʹଇͬͯશͰͳ͚ΕͳΒͣɺ ޙʑɺଞͷਓ͕ཧʹཪଧͪ͞Ε͍ͯͳ͍࠷దԽΛߦ͏ ༠ʹ͔ΒΕͯɺίʔυ͕͙ͪΌ͙ͪΌʹͳͬͯ͠·Θͳ͍Α͏ɺ ࣮ߦޮ࠷ߴʹ͍ۙͷͰͳ͚ΕͳΓ·ͤΜɻ ΫϦʔϯίʔυͱͭͷ͜ͱΛ্ख͘Δ͜ͱͰ͢ɻ #KBSOF4USPVTUSVQ
։ൃऀʹͱͬͯʮྑ͍ʯίʔυ Մಡੑ͕ߴ͍ʢSFBEBCMFʣ อकੑ͕ߴ͍ʢNBJOUBJOBCMFʣ ϘΫ͕ࢥ͏
ͦΜͳ؆୯ʹʮྑ͍ʯίʔυ ॻ͚ͳ͍ ͱ͍͑ɺ
ͳ͔ͥʁ
None
͜͜Ͱڥ൜ࡑֶͷΛ ࣏͕҆ѱԽ͢Δ·Ͱʹ࣍ͷܦաΛͨͲΔɻ ݐͷ૭͕յΕ͍ͯΔͷΛ์ஔ͢ΔͱɺͦΕ͕ʮ୭֘۠ʹ ରؔ͠৺Λ͍ͬͯͳ͍ʯͱ͍͏αΠϯͱͳΓɺ൜ࡑΛى͜͢͠ ͍ڥΛ࡞Γग़͢ɻ ΰϛͷϙΠࣺͯͳͲͷܰ൜ࡑ͕ى͖Δɻ ॅຽͷϞϥϧ͕Լͯ͠ɺҬͷৼڵɺ҆શ֬อʹڠྗ͠ͳ͘ͳ ΔɻͦΕ͕͞ΒʹڥΛѱԽͤ͞Δɻ ڟѱ൜ࡑΛؚΊͨ൜ࡑ͕ଟൃ͢ΔΑ͏ʹͳΔɻ
ιϑτΣΞ։ൃͷݱͰ ࣅͨΑ͏ͳޫܠ͋Γ·ͤΜ͔ʁ
#SPLFO8JOEPX5IFPSZ ࣏҆Λճ෮ͤ͞Δʹ ɾҰݟແͰ͋ͬͨΓɺܰඍͳடংҧߦҝͰऔΓక·Δ ʢ͝Έ͖ͪΜͱผࣺͯͯ͠ΔͳͲʣ ɾܯ৬һʹΑΔύτϩʔϧަ௨ҧͷऔΓక·ΓΛڧԽ͢Δ ɾҬࣾձܯ৬һʹڠྗ͠ɺடংͷҡ࣋ʹྗ͢Δ
ׂΕͨ૭Λ์ஔ͓͔ͯ͠ͳ͍ #PZ4DPVU3VMF ɾѱ͍ઃܭɺؒҧͬͨҙࢥܾఆɺ࣭ͷѱ͍ίʔ υɺൃݟͱಉ࣌ʹશͯम෮͢Δ ɾ͠ਖ਼͘͠म෮͢Δ͚ͩͷ͕࣌ؒͳ͚Ε ɺͦͷࢫΛΘ͔Γ͘͢ίϝϯτͳͲͰ໌ ࣔ͢Δ
-FBWFUIJTXPSMEBMJUUMF CFUUFSUIBOZPVGPVOEJU ͕ࣗ࠷ॳʹݟͨ࣌ΑΓɺੈքΛ͍͍ॴʹ͘͢ྗ͠Α͏ 3PCFSU#BEFO1PXFMM
Ͳ͏ͬͯιʔείʔυͷ Λૣظൃݟ͢Δ͔ʁ ͡Ό͋ɺ
ͦ͜Ͱ
&4-JOUΛ͏ϝϦοτ ຊ࣭తͰͳ͍ϨϏϡʔ͕ݮΔ ੩తղੳʹΑΔෆ۩߹ͷൃݟ
&4-JOUΛ͏ϝϦοτ ຊ࣭తͰͳ͍ϨϏϡʔ͕ݮΔ ੩తղੳʹΑΔෆ۩߹ͷൃݟ
ຊ࣭తͰͳ͍ϨϏϡʔ const person = { name: “Steve Jobs”, age: 45
}; ɾ0CKFDUͷ࠷ޙͷϓϩύςΟʹίϯϚ͚ͭͯཉ ͍͠ͳɻHJUͷ͕ࠩΑΓΘ͔Γ͍͔͢ΒͶɻ ɾϘΫμϒϧΫΥʔτΑΓγϯάϧΫΥʔτͷ ํ͕͖ͳΜͩɻ4IJGUΛԡͣ͞ʹೖྗͰ͖Δ͔Β Ͷɻ
ୀ۶ͳ͜ͱ&4-JOUʹΒͤΑ͏ ɾਓ͕ؒϓϩάϥϜͷॻ͖ํͷҧ ͍Λࢦఠ͢Δ͜ͱɺ݂Ͱ݂Λચ ͏ऴΘΓͷͳ͍૪͍ΛੜΈग़͢ ɾਓؒؔͷѱԽΛڪΕͯɺࢦఠ Λ͠ͳ͍ͷιϑτΣΞͷʮׂ Εͨ૭ʯΛ์ஔ͢Δ͜ͱ ɾຊདྷɺਓ͕ؒΔ͖αʔϏε ϩδοΫ༷ͷϨϏϡʔʹूத ͠Α͏
&4-JOUΛ͏ϝϦοτ ຊ࣭తͰͳ͍ϨϏϡʔ͕ݮΔ ੩తղੳʹΑΔෆ۩߹ͷൃݟ
੩తղੳͱʁ ίʔυΛ࣮ߦͤͣʹߦ͏ݕূ ɾίʔυͷՄಡੑʹؔ͢Δ ɹɹΠϯσϯτͳͲͷॻࣜҧ ɹɹ໋໊نҧ ɾίʔυͷෳࡶ͞ͳͲʹؔ͢Δݕূ ɹɹΫϥεɺϝιουͷॲཧͷෳࡶ͞ ɹɹΫϥεؒͷґଘؔ
ࠓͷຊ ͬͱ
$ZDMPNBUJDDPNQMFYJUZ ॥తෳࡶ
ʮ॥తෳࡶʯͱʁʁʁ ɾ5IPNBT.D$BCF͕։ൃͨ͠ ιϑτΣΞଌఆ๏ͷҰछ ɾϓϩάϥϜͷ੍ޚϑϩʔΛάϥϑͱͯ͠ දݱ͠ɺܭࢉ͞ΕΔɻ ɾJG FMTF GPS TXJUDI͕ଟ͍ذύλʔϯ ͕ଟ͍΄Ͳෳࡶ͕ߴ͍
ɾ॥తෳࡶ͕ߴ͍΄Ͳɺόάͷࠞೖ͕ ߴ͍ͱݴΘΕ͍ͯΔɻ
&4-JOUͰ $ZDMPNBUJDDPNQMFYJUZ { "complexity": ["error", 10] } Λɺ͋ͳͨͷFTMJOUSDʹՃ͢Δ͚ͩʂ؆୯ʂ
ෳࡶΛଌΔπʔϧͰ ͜Μͳͷ͋Γ·ͨ͠ ͦͷଞʹ
FTBOBMZTJTQMBUP +BWB4DSJQUͷίʔυΛղੳͯ͠ɺίʔυߦ ෳࡶεςοϓͳͲΛՄࢹԽͯ͘͠ΕΔ OQNύοέʔδ IUUQTXXXOQNKTDPNQBDLBHFQMBUP
࣮ࡍͷγεςϜͰݕূͯ͠Έͨ
ࠓճͷݕূରγεςϜ ɾ݄pSTUDPNNJUͷ3FBDUϓϩδΣΫτ ɾॳظϑϩϯτΤϯυઐΤϯδχΞਓ ɾۀҕୗͱΠϯλʔϯੜͷͱྦͷ݁থ ɾνʔϜϝϯόʔʮෛ࠴ͦ͏ʜʯ
QMBUPͰͷݕূ݁Ռ ສߦʂ ͼͬ͘Γʂ ͓ʁ ҙ֎ͱେৎʁ
&4-JOUͰͷݕূ݁Ռ ສߦͷதͰFSSPSʂࢥͬͯΑΓগͳ͍ʜ☺
॥తෳࡶͱόάࠞೖͷؔ ࢀߟɿIUUQTXXXJOGPRDPNOFXTDZDMPNBUJDDPNQMFYJUZ ॥తෳࡶ όάࠞೖ֬
·ͱΊ ɾϦϑΝΫλϦϯάΛͲ͔͜ΒखΛ͚Δ͔ͷ ํΛܾΊΔஅࡐྉ͕ू·ͬͨʂ ɹϦϑΝΫλલޙͰ͕Ͳ͏ͳΔָ͔͠Έ ɾνʔϜϝϯόʔͷίʔυʹରͯ͠ͷةػҙࣝ ͕ߴ·ͬͨ ɹΞʔΩςΫνϟ৽ϓϩδΣΫτ࢝ಈʂ
5IBOLT