Upgrade to Pro — share decks privately, control downloads, hide ads and more …
Sign up for free

【Go言語】イテレータ

Sponsored · Your Podcast. Everywhere. Effortlessly. Share. Educate. Inspire. Entertain. You do you. We'll handle the rest. →
Avatar for Tomoki Ota Tomoki Ota
September 11, 2024
Programming
130
0

 【Go言語】イテレータ

Go1.23から追加されたイテレータについて解説しています。
今後増量予定。

Avatar for Tomoki Ota

Tomoki Ota

September 11, 2024

More Decks by Tomoki Ota

See All by Tomoki Ota
アーキテクチャの価値
Avatar for Tomoki Ota tomo1227
0
130
アーキテクチャとビジネスロジック
Avatar for Tomoki Ota tomo1227
0
140
【Go言語】テスト
Avatar for Tomoki Ota tomo1227
0
100
【Go言語】クロージャ
Avatar for Tomoki Ota tomo1227
0
360
【Go言語】エラーハンドリング
Avatar for Tomoki Ota tomo1227
0
110
AIに淘汰されないようにするには？
Avatar for Tomoki Ota tomo1227
0
110
【Go言語】range
Avatar for Tomoki Ota tomo1227
0
110
【Go言語】break
Avatar for Tomoki Ota tomo1227
0
120
【Go言語】反復処理
Avatar for Tomoki Ota tomo1227
0
90

Other Decks in Programming

See All in Programming
Ghostty + Neovimで作る 透明でカッコ良い開発環境
Avatar for Kanade Nonomura j341nono
0
160
AI主導のプログラミング学習アプリを作ってみた
Avatar for econanringo econanringo
0
150
Streamlitで実現する自然言語データアプリ開発
Avatar for Ayumu Yamaguchi ayumu_yamaguchi
1
360
UnityでSystem.Net.WebSocketsなWebSocketサーバが動かないのでUnity Monoのコードを覗いてみた / about implementing websocket server with unity mono
Avatar for にー兄さん drumath2237
1
580
CodeRabbitの効果検証と過ごしてみた3ヶ月
Avatar for armondando armondando
0
210
パーソナライズPodcastを作った話
Avatar for repunit11 repunit11
0
130
AIに “答え“を書かせるのを やめてみた
Avatar for akari ___akari11
0
110
気持ちぃ〜角丸 Squircle
Avatar for ryu ryu1013
0
200
[Rails World 2026] Durable orchestration on Rails: from continuation to workflow
Avatar for Vladimir Dementyev palkan
1
690
自サークルのIdPからログアウトできるようになるまで
Avatar for taiseiue taiseiue
1
130
Atomic Design, Enforced: Scaling Mobile Design Systems (next.app devCon / droidCon Berlin 2026)
Avatar for Stelios Frantzeskakis steliosf
PRO
0
160
なぜCTOを降りてFDEを選んだのか？〜なぜプロダクト企業がFDEで顧客の現場に踏み込むのか〜
Avatar for ryuta sakamoto gonta
1
180

Featured

See All Featured
The B2B funnel & how to create a winning content strategy
Avatar for Katarina Dahlin katarinadahlin
PRO
1
560
The MySQL Ecosystem @ GitHub 2015
Avatar for Sam Lambert samlambert
251
13k
Why Mistakes Are the Best Teachers: Turning Failure into a Pathway for Growth
Avatar for Umar Saidu Auna auna
0
320
Building a Modern Day 
E-commerce SEO Strategy
Avatar for Aleyda Solis aleyda
45
9.2k
We Have a Design System, Now What?
Avatar for Morgane Peng morganepeng
55
8.4k
Building a A Zero-Code AI SEO Workflow
Avatar for Ian Lurie portentint
PRO
0
770
Redefining SEO in the New Era of Traffic Generation
Avatar for Szymon Słowik szymonslowik
1
470
The Limits of Empathy - UXLibs8
Avatar for Cassini Nazir cassininazir
2
710
How to Talk to Developers About Accessibility
Avatar for Jason CranfordTeague jct
2
570
Ethics towards AI in product and experience design
Avatar for Skipper Chong Warson skipperchong
2
420
How to Build an AI Search Optimization Roadmap - Criteria and Steps to Take #SEOIRL
Avatar for Aleyda Solis aleyda
1
2.2k
Bash Introduction
Avatar for André Augusto Costa Santos 62gerente
615
220k

Transcript

  1. Tomoki Ota ʲGoݴޠʳΠςϨʔλ

  2. ΠςϨʔλͱ͸ʁ ֎෦ΠςϨʔλ&಺෦ΠςϨʔλ Iteratorύλʔϯ Visitorύλʔϯ δΣωϨʔλ GoͷΠςϨʔλ ΞδΣϯμ 2

  3. ΠςϨʔλͱ͸ʁ

  4. ΠςϨʔλͱ͸ʁ 4 ΠςϨʔλ(൓෮ࢠ) : σʔλू߹ͷཁૉʹॱ൪ʹΞΫηε͢ΔͨΊͷ࢓૊Έ

  5. ΠςϨʔλͱ͸ʁ 5 ίϨΫγϣϯͷཁૉͷྻڍɾ൓෮ͷํ๏ʹ͸ɺ2ͭͷํ͕ࣜ͋Δɻ •಺෦ΠςϨʔλ •֎෦ΠςϨʔλ

  6. ֎෦ΠςϨʔλ&಺෦ΠςϨʔλ

  7. ֎෦ΠςϨʔλ 7 ίϯςφͷཁૉΛॱʹऔΓग़ͨ͢ΊͷผͷΦϒδΣΫτΛ༻ҙ͢Δํࣜ(Java, C++ͳͲ) ίϯςφͷཁૉΛॱʹऔΓग़ͨ͢ΊͷผͷΦϒδΣΫτΛΠςϨʔλ(Χʔιϧ)ͱݺͿɻ •࣮૷͕೉͍͠ •ίʔυ͕ෳࡶ •ෳ਺ͷίϯςφ͔ΒҰͭͣͭཁૉΛऔΓग़͠ ฒߦʹॲཧ͢ΔΑ͏ͳखଓ͖͕ಘҙ

  8. ಺෦ΠςϨʔλ 8 ݸʑͷཁૉ͝ͱͷॲཧΛදݱ͢Δ΋ͷΛίϯςφɾΦϒδΣΫτͷϝιουʹ౉͠ɼ ϝιου͕ཁૉ͝ͱͷॲཧΛݺͼฦ͢λΠϓͷ܁Γฦ͠ํࣜ(RubyͳͲ) • ࢖͏ͷ΋࡞Δͷ΋؆୯ • Ϋϩʔδϟ͕ͳ͍ͱϧʔϓຊମͱ֎ଆͱͰ৘ใΛڞ༗͢ΔͨΊʹ ޻෉͕ඞཁʹͳΔͷͰɺ࢖͍উख͕ѱ͘ͳΔɻ

  9. Itaratorύλʔϯ

  10. Itaratorύλʔϯ 10 GoFʹΑͬͯఆٛ͞ΕͨσβΠϯύλʔϯͷ1ͭɻ ΠςϨʔλΛ࢖༻͢Δ͜ͱͰɺϦετɺ ελοΫɺ πϦʔͳͲͷ ࣮ࡍͷσʔλߏ଄ΛҙࣝͤͣʹɺཁૉΛ୳ࡧ͢Δ͜ͱ͕Ͱ͖Δɻ

  11. Itaratorύλʔϯ 11 ந৅ ۩৅

  12. ItaratorύλʔϯͷϝϦοτ 12 • ୯Ұ੹೚ͷݪଇɻ ͔͞͹Δ୳ࡧΞϧΰϦζϜΛผΫϥεʹநग़͢Δ͜ͱʹΑΓ ΫϥΠΞϯτɾίʔυͱίϨΫγϣϯͷ੔ཧ੔಴͕Մೳ • ΦʔϓϯɾΫϩʔζυͷݪଇɻ ৽͍͠छྨͷίϨΫγϣϯͱΠςϨʔλʔΛ࣮૷͠ طଘͷίʔυʹ໰୊ͳ͘౉͢͜ͱ͕Մೳ

    • ֤ΠςϨʔλʔɾΦϒδΣΫτ͕ࣗ਎ͷ൓෮ঢ়ଶΛ͍࣋ͬͯΔͨΊ ಉ͡ίϨΫγϣϯΛฏߦͯ͠൓෮Մೳ • ಉ͡ཧ༝Ͱɺ ൓෮ΛҰ࣌தஅͯ͠ඞཁͳ࣌ʹ࠶։͢Δ͜ͱ͕Մೳ

  13. ItaratorύλʔϯͷϝϦοτ 13 •ΞϓϦ͕୯७ͳίϨΫγϣϯͱͷΈಈ࡞͢Δ৔߹ ͜ͷύλʔϯͷద༻͸৑௕ͳՄೳੑ͕͋Δ •ಛఆͷಛघͳίϨΫγϣϯͷ৔߹ɺ ΠςϨʔλʔͷ࢖༻͸ ཁૉΛ௚઀ݟͯߦ͘ΑΓ΋ඇޮ཰ͳՄೳੑ͕͋Δ

  14. Visitorύλʔϯ

  15. Itaratorύλʔϯ v.s Visitorύλʔϯ 15 Itaratorύλʔϯ : ίϨΫγϣϯͷཁૉʹॱʹ̍ͭͣͭΞΫηε͢Δ Visitorύλʔϯ : ίϨΫγϣϯͷཁૉΛ̍ͭ̍ͭ८ͬͯɺԿΒ͔ͷॲཧΛ

    ߦ͍ͬͯ͘

  16. Itaratorύλʔϯ v.s Visitorύλʔϯ 16

  17. δΣωϨʔλ

  18. δΣωϨʔλͱ͸ 18 ΠςϨʔλΛ؆୯ʹ࡞Δ͜ͱ͕Ͱ͖ΔɻΠςϨʔλΛฦؔ͢਺ δΣωϨʔλؔ਺ͱ΋͍͏ɻ ·ͨɺδΣωϨʔλؔ਺Ͱ࡞੒͞ΕͨΠςϨʔλͷ͜ͱΛ δΣωϨʔλͱݺͿ͜ͱ΋͋Δɻ

  19. GoͷΠςϨʔλ

  20. range over int

  21. range over int 21 Go1.22Ҏ߱ Go1.22Ҏલ

  22. range over func

  23. range over func 23 GoͷΠςϨʔλͷσϑΝΫτελϯμʔυ

  24. v1.23ҎલͷΠςϨʔλ 24 database/sql.Rows archive/tar.Reader.Next

  25. range over func 25 ҎԼͷγάωνϟͷؔ਺ΛrangeͰ൓෮ॲཧͰ͖Δɻ

  26. range over func 26

  27. range over func 27 rangeͰyieldΛ࢖༻͢Δ͜ͱ͕Ͱ͖ΔΑ͏ʹͳͬͨɻ

  28. GoͷΠςϨʔλ 28 • Push(ඪ४)ΠςϨʔλ : 1ͭͣͭσʔλΛ౉͢ • PullΠςϨʔλ : 1ͭͣͭσʔλΛड͚औΔ

  29. func(func()bool) 29

  30. 30 func(func(V)bool)

  31. func(func(K, V)bool) 31

  32. iterύοέʔδ

  33. iterύοέʔδ 33 https://github.com/golang/go/tree/go1.23.0/src/iter 1.23Ͱ௥Ճ͞Εͨ

  34. PushΠςϨʔλ 34

  35. PushΠςϨʔλ 35

  36. PushΠςϨʔλ 36 iter.Seq ͷ಺༰Λશͯը໘ʹදࣔ͢Δྫ

  37. PushΠςϨʔλ 37

  38. PushΠςϨʔλ 38

  39. PullΠςϨʔλ 39

  40. PullΠςϨʔλ 40 • PushܕͷΠςϨʔλΛPullܕʹม׵͢Δ • next ͸ΠςϨʔλͷ࣍ͷ஋ͱɺ༗ޮͳ஋͕͋Δ͔Ͳ͏͔ͷਅِ஋Λฦ͢ • stop ͸ΠςϨʔλΛऴྃͤ͞Δ

    • stop Λݺͼग़ͨ͠ޙɺnext ͔Β͸θϩ஋ͱfalse͕ৗʹฦΔ

  41. PullΠςϨʔλ 41

  42. ඪ४Ξμϓλؔ਺

  43. Adapter 43 ஋ͷγʔέϯεΛϑΟϧλʔͯ͠৽͍͠γʔέϯεΛฦؔ͢਺

  44. Adapter 44