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
83
99k
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
3k
TokyoGirls.rb Meetup vol.2 #tokyogirlsrb
jnchito
0
5.4k
○○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
45
76k
Other Decks in Programming
See All in Programming
MCP調べてみました! / Exploring MCP
uhzz
2
2.3k
大LLM時代にこの先生きのこるには-ITエンジニア編
fumiyakume
7
3.1k
海外のアプリで見かけたかっこいいTransitionを真似てみる
shogotakasaki
1
180
ComposeでWebアプリを作る技術
tbsten
0
120
メモリウォールを超えて:キャッシュメモリ技術の進歩
kawayu
0
1.9k
「”誤った使い方をすることが困難”な設計」で良いコードの基礎を固めよう / phpcon-odawara-2025
taniguhey
0
160
AWSで雰囲気でつくる! VRChatの写真変換ピタゴラスイッチ
anatofuz
0
160
Golangci-lint v2爆誕: 君たちはどうすべきか
logica0419
1
130
The Efficiency Paradox and How to Save Yourself and the World
hollycummins
0
110
Exit 8 for SwiftUI
ojun9
0
140
Deoptimization: How YJIT Speeds Up Ruby by Slowing Down / RubyKaigi 2025
k0kubun
0
860
KawaiiLT 登壇資料 キャリアとモチベーション
hiiragi
0
120
Featured
See All Featured
Side Projects
sachag
452
42k
The Cult of Friendly URLs
andyhume
78
6.3k
Mobile First: as difficult as doing things right
swwweet
223
9.6k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
32
5.4k
The Invisible Side of Design
smashingmag
299
50k
Java REST API Framework Comparison - PWX 2021
mraible
30
8.5k
Making Projects Easy
brettharned
116
6.1k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
178
53k
Testing 201, or: Great Expectations
jmmastey
42
7.5k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
32
2.2k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
The Language of Interfaces
destraynor
157
25k
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