Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Sign up for free
Menu
Search
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Pricing
Search
Sign in
Sign up for free
LTの敷居を下げる / Lower the threshold for LT
Search
Sponsored
·
SiteGround - Reliable hosting with speed, security, and support you can count on.
→
Takumi Shotoku
January 11, 2024
Technology
450
2
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
LTの敷居を下げる / Lower the threshold for LT
【オフライン開催】Omotesando.rb #93
https://omotesandorb.connpass.com/event/305893/
Takumi Shotoku
January 11, 2024
More Decks by Takumi Shotoku
See All by Takumi Shotoku
TypeProf 開発レポート 2026-05 / TypeProf Dev Report 2026-05
sinsoku
1
150
Automatically generating types by running tests
sinsoku
4
19k
滅・サービスクラス🔥 / Destruction Service Class
sinsoku
8
2.9k
テストを書かないためのテスト/ Tests for not writing tests
sinsoku
1
320
ドメインの本質を掴む / Get the essence of the domain
sinsoku
2
360
"型"のあるRailsアプリケーション開発 / Typed Rails application development
sinsoku
11
3.1k
Let's get started with Ruby && Rails Tips
sinsoku
0
520
CircleCIの高速化🚀 / CircleCI faster
sinsoku
3
1.6k
Railsアプリと型検査 / Rails app and type checking
sinsoku
5
1.7k
Other Decks in Technology
See All in Technology
1万名の社員が使う認証基盤で どう信頼性を担保するか?
kairim0
0
210
ai_cording_with_k8s_knowledge.pdf
mochizuki875
1
280
自主式軟體工廠
philipz
0
220
生成AIを使って「人が」考える技術 ― AI時代の人機共想と実践ノウハウ|UNITT AC2026
ishiirikie
0
550
おそらく日本で唯一のDevRelインターン生として
husengs7
0
170
[2026 Oracle Technical Deep Dive] Apache Iceberg × Oracle AI Database -Oracle Autonomous AI Lakehouseが実現するAI時代のデータ基盤- (2026年9月17日開催)
oracle4engineer
PRO
0
110
Google Cloud Next Tokyo 26登壇時のスクリプト
recruitengineers
PRO
0
200
あなたの知らないAmazon VPC Route Server/Amazon VPC Route Server you don't know about
masakiokuda
2
220
ファミコンでPHPを動かす / PHP on the Famicom side b
tomzoh
0
140
スキルを作る、その前に!複数人で使われるスキルを 作るためのプロセス
junkifurukawa
2
320
Codex概要
ymiya55
0
400
AI時代のAPI開発を加速する品質ガードレール / API Quality Guardrails in the AI Era
yokawasa
0
140
Featured
See All Featured
Conquering PDFs: document understanding beyond plain text
inesmontani
PRO
4
3.2k
Digital Projects Gone Horribly Wrong (And the UX Pros Who Still Save the Day) - Dean Schuster
uxyall
1
3.2k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
232
55k
Designing for humans not robots
tammielis
254
26k
Abbi's Birthday
coloredviolet
4
10k
技術選定の審美眼(2025年版) / Understanding the Spiral of Technologies 2025 edition
twada
PRO
120
120k
SEO for Brand Visibility & Recognition
aleyda
0
4.8k
The browser strikes back
jonoalderson
0
1.8k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
16
2.2k
Testing 201, or: Great Expectations
jmmastey
46
8.3k
Joys of Absence: A Defence of Solitary Play
codingconduct
1
530
Mozcon NYC 2025: Stop Losing SEO Traffic
samtorres
1
570
Transcript
LTͷෑډΛԼ͛Δ Omotesando.rb #93 2024/01/11 1
ࣗݾհ • ໊લ: ਖ਼ಙ (aka: ਆ) • GitHub: @sinsoku (ը૾ӈ্)
• Twitter: @sinsoku_listy (ը૾ӈԼ) • ͖ͳݴޠ: Rust ! , Ruby " • Railsྺ: 8͘Β͍ 2
એ: ໌1/12(ۚ)ʹ։࠵ ձ גࣜձࣾϚωʔϑΥϫʔυ ͞Μʹ͓आΓ͠ɺRBSܕΛ৮ ΔձΛ͠·͢ɻ 3
͢͜ͱ • ! LTͷෑډ͕ߴ͍ʁ • ⭐ LTͷϝϦοτ • # εϥΠυͷ࡞ΓํͳͲ
• $ ͓·͚: Rubyͷ • Omotesando.rb ͳͷͰ 4
! LTͷෑډ͕ߴ͍ʁ • ొஃͯ͢͠ωλ͕ແ͍ • ਓલͰ͢ͷ͕ۤख • ܦݧ͕ແ͍ͷͰෆ҆ 5
͢ωλ Omotesando.rb ຖ݄։࠵ͯ͠ΔͷͰɺRubyؔ࿈Ͱ৽֮͑ͨ͘͠ Կ͔Λ͘͢Β͍ͷؾ࣋ͪͰྑ͍ɻ • Rubyͷศརϝιουɺػೳͷհ • ͋·ΓΒΕ͍ͯͳ͍ڍಈͷհ • ʮ͜Ε͕όάͷݪҼͰͨ͠ʯͳͲ1
1 ⚠ ۀͷ۩ମྫΛ͠ա͗ͳ͍Α͏ʹҙ 6
ਓલͰ͢ͷ͕ۤख / ܦݧ͕ແ͍ͷͰෆ҆ 7
ͦΕͳ 8
͢ͷ͕ۤख / ෆ҆ ొஃܦݧ͕૿͑Δͱɺগ͠׳ΕΔɻ ͨͩɺਓ͕૿͑ΔͱࠓͰۓு͢Δɻ 9
LTʹର͢Δߟ͑ํ • ⏳ Ͱ͖Δ͚ͩ 5 ͰऴΘΒͤΔ • LT͕໘ന͘ͳͯ͘5ͳΒେৎ • "
୭͔ͷʹཱͭ 10
࣭ 1. Omotesando.rb ॳࢀՃͷํ 2. Ruby/Railsͷܦݧ͕3ະຬͷํ 11
⭐ LTͷϝϦοτ • ! ొஃͷޙʹใ͕ू·Δ • " ొஃͷ࿅शʹͳΔ • #
كʹొஃґཔΛड͚Δ 12
! εϥΠυ࡞ιϑτ • Google Slides • Deckset for Mac 13
Google Slides • ແྉ • Windows, Mac Ͱར༻Մ • ៉ྷͳσβΠϯ͕࡞ΕΔ
• จࣈɾը૾Λࣗ༝ʹஔͰ͖Δ ҎલʹΑ͍ͬͯͨ͘ɻձࣾͷςʔϚΛ͏ͱ͖ͬͪ͜ɻ 14
Desckset for Mac • ༗ྉʢ$35/one-timeʣ • ϚʔΫμϯه๏Ͱ࡞Մೳ • GitHubͰཧͰ͖Δ •
จࣈɾը૾ͷஔʹ੍ݶ͕͋Δ ࠷ۙͬͪ͜Λ͍ͬͯΔɻ࣌ؒͰεϥΠυ͕࡞Εͯศརɻ 15
! ը૾Λ͏ • ! จࣈ͚ͩͩͱ୯ௐʹͳΔ • ✨ ҹʹΔ • #
্ख͘͏ͱ໘ന͍ 16
ΞϯΨʔϚωδϝϯτͷษڧͰಡΜͩຊ • ΞϯΨʔϚωδϝϯτೖ • ଞऀͱಇ͘ / ʮΘ͔Γ͋͑ ͳ͞ʯ͔Β࢝ΊΔ৫ • ࣗͷখ͞ͳʮശʯ͔Β
ग़͢Δํ๏ • ը૾ 17
⚠ ஶ࡞ݖͷѻ͍ • εϥΠυͷར༻άϨʔ2 • ΦϯϥΠϯެ։ආ͚ͨํ͕ྑ͍ • SpeakerDeck ʹ্͛Δલʹফ͢ •
ΧϯϑΝϨϯεͰར༻Λආ͚ͨํ͕ྑ͍ 2 ৄ͘͠ͳ͍ͷͰࣗ৴ͳ͍ 18
! αʔόαΠυΤϯδχΞ ͜ΕαόͰ͢ ! 19
! map, flat_map, filter_map ͷհ map p [1, 2, 3].map
{ |n| n * 3 } #=> [3, 6, 9] 20
! map ͱ flat_map ͷҧ͍ map [[1,2], [3,4]].map { |i|
i.map { |j| j*2 } } #=> [[2, 4], [6, 8]] flat_map [[1,2], [3,4]].flat_map { |i| i.map { |j| j*2 } } #=> [2, 4, 6, 8] 21
! map ͱ filter_map ͷҧ͍ map (1..10).map { |i| i
* 2 if i.even? } #=> [nil, 4, nil, 8, nil, 12, nil, 16, nil, 20] filter_map (1..10).filter_map { |i| i * 2 if i.even? } #=> [4, 8, 12, 16, 20] 22
! ͥͻ࣍ճొஃ͠·͠ΐ͏ 23