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
Junichi Ito
November 15, 2018
Programming
1
3k
Unhappy Exception Handling
I talked at Ruby Conf 2018 lightning talks.
Junichi Ito
November 15, 2018
Tweet
Share
More Decks by Junichi Ito
See All by Junichi Ito
Enjoy Ruby programming, Enjoy Ruby community! #osrb03
jnchito
3
11k
良質な技術記事を量産する秘訣 / #MeetsPro
jnchito
22
16k
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
85
100k
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
3.1k
TokyoGirls.rb Meetup vol.2 #tokyogirlsrb
jnchito
0
6.4k
○○からRubyへ / #toyamark
jnchito
3
4.7k
プログラマがコードを書きながら考えること / #ginzarails
jnchito
4
12k
なぜテストを書くの?(または書かないの?) 〜テストコードの7つの役割〜 / #tamarubykaigi01
jnchito
46
77k
Other Decks in Programming
See All in Programming
Google I/O recap web編 大分Web祭り2025
kponda
0
2.9k
Vibe coding コードレビュー
kinopeee
0
450
コーディングは技術者(エンジニア)の嗜みでして / Learning the System Development Mindset from Rock Lady
mackey0225
2
490
ライブ配信サービスの インフラのジレンマ -マルチクラウドに至ったワケ-
mirrativ
1
230
Portapad紹介プレゼンテーション
gotoumakakeru
1
130
Understanding Kotlin Multiplatform
l2hyunwoo
0
260
decksh - a little language for decks
ajstarks
4
21k
WebAssemblyインタプリタを書く ~Component Modelを添えて~
ruccho
1
840
令和最新版手のひらコンピュータ
koba789
13
7.8k
サイトを作ったらNFCタグキーホルダーを爆速で作れ!
yuukis
0
350
Constant integer division faster than compiler-generated code
herumi
2
660
Google I/O Extended Incheon 2025 ~ What's new in Android development tools
pluu
1
290
Featured
See All Featured
The Language of Interfaces
destraynor
159
25k
Making the Leap to Tech Lead
cromwellryan
134
9.5k
The World Runs on Bad Software
bkeepers
PRO
70
11k
Adopting Sorbet at Scale
ufuk
77
9.5k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
8
460
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
34
6k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
161
15k
How to Ace a Technical Interview
jacobian
279
23k
Unsuck your backbone
ammeep
671
58k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
26k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.6k
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