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
Unhappy Exception Handling
Search
Sponsored
·
Ship Features Fearlessly
Turn features on and off without deploys. Used by thousands of Ruby developers.
→
Junichi Ito
November 15, 2018
Programming
3.1k
1
Share
Unhappy Exception Handling
I talked at Ruby Conf 2018 lightning talks.
Junichi Ito
November 15, 2018
More Decks by Junichi Ito
See All by Junichi Ito
技術記事、AIに書かせるか、自分で書くか? 〜それでも私が自分の手で書く理由〜 / #QiitaConference
jnchito
2
1.3k
技術記事のお悩み、解決します #技術書の話をしよう / 2026-05-27
jnchito
1
58
Enjoy Ruby programming, Enjoy Ruby community! #osrb03
jnchito
3
12k
良質な技術記事を量産する秘訣 / #MeetsPro
jnchito
23
17k
出版したら終わり、にしない技術書執筆 / #DevRel #DevReljp
jnchito
0
12k
リーダブルテストコード / #vstat
jnchito
84
110k
銀座Rails版 「Rubyプログラミング問題に チャレンジ!」公開コードレビュー / ginzarails code review
jnchito
3
3.2k
TokyoGirls.rb Meetup vol.2 #tokyogirlsrb
jnchito
0
6.7k
○○からRubyへ / #toyamark
jnchito
3
4.9k
Other Decks in Programming
See All in Programming
AIチームを指揮するOSS「TAKT」活用術 / How to Use “TAKT,” an OSS Tool for Orchestrating AI Teams
nrslib
6
830
The Arts and Crafts of Work in the AI Era — Toward Mastery in Software Development
kuranuki
1
720
今さら聞けないCancellationToken
htkym
0
220
AIとRubyの静的型付け
ukin0k0
0
540
ふつうのFeature Flag実践入門
irof
7
3.5k
Language Server 使ってる? 〜VSCode と Zed の場合〜 / Are you using a Language Server? ~For VS Code and Zed~
handlename
0
750
GitHub Copilot CLIのいいところ
htkym
2
1.3k
[2026年度第1回ORセミナー] 計画最適化ベンチャーと競技プログラミング人材
terryu16
0
250
TSKaigi Night Talks 2026_TypeScriptでサプライチェーンの整合性を型に閉じ込める
geekplus_tech
0
290
不変条件と整合性境界—ビジネスが決める設計判断と実現パターン / Invariants and Consistency Boundaries
nrslib
13
3.4k
LLM本来の能力を解き放つサンドボックス技術とAI民主化への適用
yukukotani
3
2.8k
jQueryをバージョンアップする前に使いたいjQuery Migrate
matsuo_atsushi
0
190
Featured
See All Featured
Test your architecture with Archunit
thirion
1
2.3k
GitHub's CSS Performance
jonrohan
1033
470k
Making Projects Easy
brettharned
120
6.7k
Getting science done with accelerated Python computing platforms
jacobtomlinson
2
220
We Have a Design System, Now What?
morganepeng
55
8.2k
Noah Learner - AI + Me: how we built a GSC Bulk Export data pipeline
techseoconnect
PRO
0
190
Measuring & Analyzing Core Web Vitals
bluesmoon
9
860
Marketing Yourself as an Engineer | Alaka | Gurzu
gurzu
0
210
Building Flexible Design Systems
yeseniaperezcruz
330
40k
Data-driven link building: lessons from a $708K investment (BrightonSEO talk)
szymonslowik
1
1.1k
Fashionably flexible responsive web design (full day workshop)
malarkey
408
66k
Visual Storytelling: How to be a Superhuman Communicator
reverentgeek
2
550
Transcript
6/)"11:&9$&15*0/)"/%-*/( +VOJDIJ*UP
5IFCBTJDTZOUBYPGFYDFQUJPOIBOEMJOHJO3VCZ begin # Exception might happen a = 1 /
0 rescue => e # Handle the exception # and the program continues puts "error: #{e.message}" end puts a Twitter @jnchito / GitHub JunichiIto
*UJTWFSZTJNQMF CVU ➤ 4PNFQSPHSBNNFSTNJTVTFFYDFQUJPOIBOEMJOH ➤ 5IFZNJTVOEFSTUBOEl*GFYDFQUJPOIBQQFOT VTFASFTDVFA5IBU`TPLBZz ➤ 5IFZCFHJOXSJUJOHASFTDVFAFWFSZXIFSF ➤
5IFZCFMJFWFl.ZQSPHSBNJTOPXSFMJBCMFz ➤/0! Twitter @jnchito / GitHub JunichiIto
40.&:&"34"(0 Twitter @jnchito / GitHub JunichiIto
*IBEBUSPVCMFBUBQSFWJPVTKPC ➤ *KPJOFEBQSFWJPVTDPNQBOZBTBOJOIPVTFTPGUXBSFFOHJOFFS ➤ *CFDBNFUIFNBJOUBJOFSPGBOFYJTUJOHJOIPVTFXFCBQQMJDBUJPO ➤ *UXBTBHPPECPZCFDBVTFJUIBECFFOSVOOJOH1&3'&$5-:GPSZFBST ➤ 0OFEBZ *IBEBOPQQPSUVOJUZUPUBMLXJUIPOFPGUIFVTFST
➤ )FTIPXFENFIJTSFHVMBSPQFSBUJPO*XBTXBUDIJOHJU ➤ )FDMJDLFEUIFTBWFCVUUPO UIFO*TBXBEJBMPHl4ZTUFNFSSz ➤ l0I XIBU 8IBU`TUIJT z ➤ l8FTFFJUWFSZPGUFO4PXF`SFDMJDLJOHUIFTBWFCVUUPOBHBJOBOEBHBJOz Twitter @jnchito / GitHub JunichiIto
None
5IFDPEFXBTMJLFUIJT OPU3BJMTBDUVBMMZ def update @post.update!(post_params) redirect_to @post rescue => e
# Just display error code flash[:alert] = "System err: #{e.code}" render :edit end ➤ /FJUIFSOPUJpFE OPSMPHHFE8FOFWFSOPUJDFEFWFOJGBOFSSPSPDDVSSFE ➤ 6OGPSUVOBUFMZ UIFVTFSTIBEBQSPDFEVSF l*GZPVHFUUIJTFSSPS LFFQPOSFUSZz ➤ 5IFSPPUDBVTF%FBEMPDLXBTJOWPMWFETPGSFRVFOUMZEVFUPBCBEUBCMFEFTJHO 6/)"11:&9$&15*0/ )"/%-*/()&3& Twitter @jnchito / GitHub JunichiIto
$PODMVTJPO8IBUDBOXFMFBSOGSPNUIJTTUPSZ ➤ 5IFNJTVTFPGFYDFQUJPOIBOEMJOHMFBETUFSSJCMFDPOTFRVFODFT ➤ 8IBUZPVDBOEPBOEXIBUZPVTIPVME PSTIPVMEO`U EPBSFEJ⒎FSFOU ➤ *GZPVEPO`UDPOpEFODFJOFYDFQUJPOIBOEMJOHT
➤ %0/05VTFASFTDVFATPDBTVBMMZ ➤ %FMFHBUFFYDFQUJPOIBOEMJOHUPGSBNFXPSLT QBHF MPHHJOH FUD ➤ "TLNFOUPSTGPSIFMQBCPVUZPVSDPEFEFTJHO ➤ -FU`TEPIBQQZFYDFQUJPOIBOEMJOH❤ Twitter @jnchito / GitHub JunichiIto
"#065.& ➤ +VOJDIJ*UP $BMMNF+VO ➤ 4PGUXBSF&OHJOFFSBU4POJD(BSEFO*OD ➤ %FWFMPQJOH3BJMTBQQMJDBUJPOT ➤
Twitter @jnchito ➤ GitHub JunichiIto
1&340/"-803,4 ➤ 5SBOTMBUFE&WFSZEBZ3BJMT5FTUJOHXJUI34QFD https://leanpub.com/everydayrailsrspec-jp
1&340/"-803,4 ➤ 8SPUFBCPPLDBMMFE*OUSPEVDUJPOUP3VCZ 1SPHSBNNJOHGPS'VUVSF1SPGFTTJPOBMT https://ruby-book.jnito.com/en While reading the manuscript, I
felt many times "Oh, this is what it means to truly understand other people's feelings." This book is definitely useful for everyone to go on to the "next step”. From the foreword by Matz English Publisher W anted! “Learn Ruby Before Rails.
5)"/,:06 Twitter @jnchito GitHub JunichiIto Book https://ruby-book.jnito.com/en