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
Write Code Every Day
Search
Sponsored
·
Ship Features Fearlessly
Turn features on and off without deploys. Used by thousands of Ruby developers.
→
Takuto Wada
PRO
April 25, 2016
Technology
38
10k
Write Code Every Day
Takuto Wada
PRO
April 25, 2016
Tweet
Share
More Decks by Takuto Wada
See All by Takuto Wada
予防に勝る防御なし(2025年版) - 堅牢なコードを導く様々な設計のヒント / Growing Reliable Code PHP Conference Fukuoka 2025
twada
PRO
48
28k
SQLアンチパターン第2版 データベースプログラミングで陥りがちな失敗とその対策 / Intro to SQL Antipatterns 2nd
twada
PRO
45
35k
AI時代のソフトウェア開発を考える(2025/07版) / Agentic Software Engineering Findy 2025-07 Edition
twada
PRO
187
120k
技術選定の審美眼(2025年版) / Understanding the Spiral of Technologies 2025 edition
twada
PRO
117
110k
The Clean ArchitectureがWebフロントエンドでしっくりこないのは何故か / Why The Clean Architecture does not fit with Web Frontend
twada
PRO
85
46k
組織に自動テストを書く文化を根付かせる戦略(2024冬版) / Building Automated Test Culture 2024 Winter Edition
twada
PRO
37
14k
ピラミッド、アイスクリームコーン、SMURF: 自動テストの最適バランスを求めて / Pyramid Ice-Cream-Cone and SMURF
twada
PRO
10
3.3k
組織に自動テストを書く文化を根付かせる戦略(2024秋版) / Building Automated Test Culture 2024 Autumn Edition
twada
PRO
15
7.4k
これまでと違う学び方をしたら挫折せずにRustを学べた話 / Programming Rust techramen24conf LT
twada
PRO
36
31k
Other Decks in Technology
See All in Technology
なぜ今、コスト最適化(倹約)が必要なのか? ~AWSでのコスト最適化の進め方「目的編」~
htan
1
110
SREじゃなかった僕らがenablingを通じて「SRE実践者」になるまでのリアル / SRE Kaigi 2026
aeonpeople
6
2.1k
OCI Database Management サービス詳細
oracle4engineer
PRO
1
7.3k
小さく始めるBCP ― 多プロダクト環境で始める最初の一歩
kekke_n
1
340
会社紹介資料 / Sansan Company Profile
sansan33
PRO
15
400k
データの整合性を保ちたいだけなんだ
shoheimitani
8
2.9k
使いにくいの壁を突破する
sansantech
PRO
1
120
モダンUIでフルサーバーレスなAIエージェントをAmplifyとCDKでサクッとデプロイしよう
minorun365
2
130
Sansan Engineering Unit 紹介資料
sansan33
PRO
1
3.8k
2026年はチャンキングを極める!
shibuiwilliam
9
1.9k
15 years with Rails and DDD (AI Edition)
andrzejkrzywda
0
170
顧客との商談議事録をみんなで読んで顧客解像度を上げよう
shibayu36
0
150
Featured
See All Featured
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
49
3.3k
Code Review Best Practice
trishagee
74
20k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
27k
AI Search: Implications for SEO and How to Move Forward - #ShenzhenSEOConference
aleyda
1
1.1k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
287
14k
Deep Space Network (abreviated)
tonyrice
0
45
Data-driven link building: lessons from a $708K investment (BrightonSEO talk)
szymonslowik
1
910
The Web Performance Landscape in 2024 [PerfNow 2024]
tammyeverts
12
1k
Fantastic passwords and where to find them - at NoRuKo
philnash
52
3.6k
State of Search Keynote: SEO is Dead Long Live SEO
ryanjones
0
110
Sam Torres - BigQuery for SEOs
techseoconnect
PRO
0
180
Navigating the moral maze — ethical principles for Al-driven product design
skipperchong
2
240
Transcript
Write Code Every Day Takuto Wada a.k.a @t_wada Apr 25,
2016
5BLVUP8BEB JEUXBEB !U@XBEB HJUIVCUXBEB
None
assert(typeof item.id === 'strong') | | | | | |
| false | | "foo" | Item{id:"foo",name:"bar"} "string" --- [string] 'strong' +++ [string] typeof item.id @@ -1,6 +1,6 @@ str -o +i ng I am the author of power-assert-js power-assert
ΑΖ͓͘͠ئ͍͠·͢
w K2VFSZ࡞ऀ+PIO3FTJHिʹࣗͷϓϩ μΫτ։ൃΛؤுΖ͏ͱ͕ͨ͠ɺࣦഊɻ w ฏͱಉ͡അྗͰॻ͚ͳ͍ w શͯͷि͕ۭ͍͍ͯΔΘ͚Ͱͳ͍ w Ұिؒ ͋Δ͍ೋिؒ
͍ɻίʔυ ΛΕͯ͠·͏ w ͦ͜Ͱ+PIO3FTJH͕ߦͬͨ͜ͱʜʜ ͋ͷ+PIO3FTJHͰ͏·͍͔͘ͳ͍͜ͱ
IUUQFKPIOPSHCMPHXSJUFDPEFFWFSZEBZ
ຖίʔυΛॻ͘͜ͱɻϒϩάɺυΩϡϝϯ τɺͦͷଞίʔυΛॻ͍ͨΒͬͯΑ͍ɻ ҙຯͷ͋ΔίʔυΛॻ͘͜ͱɻΠϯσϯτ ϑΥʔϚοτͷमਖ਼ɺՄೳͳΒϦϑΝΫ λϦϯάίʔυॻ͖ʹΧϯτ͠ͳ͍ɻ ਂ࣌લʹऴΘΒͤΔ͜ͱɻ ॻ͍ͨίʔυΛHJUIVCͰશͯ044ʹ͢Δ ͜ͱɻ ࢛ͭͷϧʔϧ IUUQFKPIOPSHCMPHXSJUFDPEFFWFSZEBZ
ݱࡏͷ!KFSFTJHͷHJUIVCQSPpMF IUUQTHJUIVCDPNKFSFTJH
w ඞཁ࠷খݶͷίʔυͷूதҰʙ࣌ؒఔͰҙ ຯͷ͋ΔίʔυΛॻ͘͜ͱ͕ڧ͍ΒΕΔ ٳʹͬͱ ͔͚ΒΕΔ w ϓϩάϥϛϯάͷश׳ԽHJUIVCʹΛੜ͢ͷ͕తͰ ͳ͍ɻࣗͰࣗࣗͷͨΊʹੜ׆श׳Λม͑Δͷ͕େ ࣄ
w ෆ҆ͱͷઓ͍ҎલʮेʹʯਐΜͰ͍Δ͔ɺʮे ʹʯ͍ͯ͠Δ͔ɺෆ͕҆͋ͬͨɻຖίʔυΛॻ͍ͯ ΈͯɺਐΜͰ͍Δͱ͍͏࣮ײɺ࣮ࡍͷਐḿͱಉ͘͡Β͍ ॏཁͩͱ͍͏ؾ͖ͮΛಘͨ +PIO3FTJHʹىͬͨ͜มԽ
w िͷա͔ͨ͝͠Ҏલ։ൃͷશͯΛिʹṌ͚ࣦͯ ഊ͍͕ͯͨ͠ɺ͍·िͦΕ΄ͲॏཁͰͳ͘ͳΓɺ ϦΞϧϥΠϑΛॆ࣮Ͱ͖ΔΑ͏ʹͳͬͨ w όοΫάϥϯυॲཧࢄาதɺγϟϫʔதɺৗʹίʔ υͷ͜ͱΛόοΫάϥϯυͰߟ͑ΔΑ͏ʹͳΓɺྑ ͍ΞΠσΞ͕ු͔ͿΑ͏ʹͳͬͨ w ίϯςΫετεΠονҎલिʹҰճͷ։ൃͩͬͨͷ
ͰίϯςΫετεΠονͷίετ͕͕͋ͬͨɺ͍· ຖͳͷͰͦΕ͕ͳ͍ +PIO3FTJHʹىͬͨ͜มԽ
w ϫʔΫϥΠϑόϥϯεࣄੜ׆ࣗͷϓϩδΣΫτ ͷόϥϯεͷऔΓํ͕͔ͬͨͷ͕࠷େͷऩ֭ͩͬͨɻ ຖΔͱ͍͏͜ͱɺόϥϯεΛऔΔͱ͍͏͜ͱ w ·ΘΓ͔ΒͷཧղʮຖίʔυΛॻ͘ʯͱ͍͏श׳Λ ެݴͨ͜͠ͱͰɺύʔτφʔ͔ΒͷཧղಘΒΕΔΑ ͏ʹͳͬͨ w ͲΕ͚ͩίʔυΛॻ͍͔ͨ͜ͷश׳Λଓ͚Δͱॻ͘
ίʔυΞτϓοτࣗͰ֮͑ΒΕͳ͍͘Β͍ ͷྔʹͳΓɺॆ࣮ײΛಘΒΕΔ +PIO3FTJHʹىͬͨ͜มԽ
ཁ͢ΔʹےτϨͷΑ͏ͳͷ͔ IUUQISOBCJDPN
lτϨʔχϯά͕ܧଓՄೳͰ͋ΔΑ͏ʹҙࣝ͠ͳ͕Β ࣄΛ͍ͯ͘͠ͱɺӡಈ৯ࣄɺ͋ͱੜ׆श׳ͱ͍ ͏ͷͷॏཁੑʹؾͮ͘͜ͱ͕Ͱ͖Δͱࢥ͍·͢z lͪΌΜͱతΛ࣋ͭ͜ͱɻهΛ৳͢Α͏ʹΒ ͳ͍ͱޮՌ͕ͳ͍Α͏ʹࢥ͏ΜͰ͢ɻهΛ৳ͨ͠ ͍ͱࢥ͑Δ͔Ͳ͏͔ͬͯɺʮ͖ͷόϩϝʔλʔʯͷ ͭͰ͢z IUUQISOBCJDPN ѲྗԦڼ͍ͬͯΔ
ࢲνϟϨϯδதͰ͢ ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠