Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Unhappy Exception Handling

48a913a2e3bb5e68aae6f73079648e84?s=47 Junichi Ito
November 15, 2018
Programming
1
2.6k

Unhappy Exception Handling

I talked at Ruby Conf 2018 lightning talks.

48a913a2e3bb5e68aae6f73079648e84?s=128

Junichi Ito

November 15, 2018
Tweet

More Decks by Junichi Ito

See All by Junichi Ito
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
48a913a2e3bb5e68aae6f73079648e84?s=48 jnchito
2
1.8k
TokyoGirls.rb Meetup vol.2 #tokyogirlsrb
48a913a2e3bb5e68aae6f73079648e84?s=48 jnchito
0
4.4k
○○からRubyへ / #toyamark
48a913a2e3bb5e68aae6f73079648e84?s=48 jnchito
3
3.8k
プログラマがコードを書きながら考えること / #ginzarails
48a913a2e3bb5e68aae6f73079648e84?s=48 jnchito
1
11k
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
48a913a2e3bb5e68aae6f73079648e84?s=48 jnchito
35
20k
「怖い！危ない！」で終わらせない、 スマホ・インターネットとの付き合い方 / 2019.05.18
48a913a2e3bb5e68aae6f73079648e84?s=48 jnchito
7
32k
TokyoGirls.rb Meetup vol.1 OPENING #tokyogirlsrb
48a913a2e3bb5e68aae6f73079648e84?s=48 jnchito
0
14k
したたか？天然？なんかうまくやってるITエンジニアの生存戦略 / #oso2018
48a913a2e3bb5e68aae6f73079648e84?s=48 jnchito
18
31k
プロを目指す人のための例外処理（再）入門 / #rubykansai 2018-01-13
48a913a2e3bb5e68aae6f73079648e84?s=48 jnchito
14
25k

Other Decks in Programming

See All in Programming
バンドル最適化マニアクス at tfconf
3aebd86547bfc5cdb451d5f2f95ed5d8?s=48 mizchi
5
2.4k
Loom is Blooming
F784a8de872a5d98f67ac5ccbd6683d0?s=48 josepaumard
3
570
Learning DDD輪読会#4 / Learning DDD Book Club #4
E10ba38646a905c8cd2c893c84d5c520?s=48 suzushin54
1
160
近況PHP / PHP in now a days
271fad8d53cd1f12f2b4b6d38e3d7bd3?s=48 uzulla
4
2k
Reactでアプリケーションを構築する多様化
2917a3c430817eb71086f8973c06ebba?s=48 sakito
4
3.5k
スモールチームがAmazon Cognitoでコスパよく作るサービス間連携認証
87980686562669ac5ec4617ca53047f9?s=48 tacke_jp
2
940
CLI構築のススメ
1bf2570004ba1a6261e5a252deef2719?s=48 nyankotaro
1
260
【Qiita Night】新卒エンジニアによるSwift6与太予想
3fc2c76b81e2acd1a263f30db01a248a?s=48 eiji127
0
190
デュアルトラックアジャイル × Agile Testingから 見えてきたQAのミライ
F0a8d07597a19192791bf663504d2a17?s=48 atamaplus
0
500
Better Reliability through Observability (and Experimentation)
8c73ec710b03be8909e71ad500866934?s=48 ksatirli
PRO
1
380
코드 품질 1% 올리기
354271902cd8ba2762d05b251dfa0f84?s=48 pluu
1
1k
Update from the Elixir team - 2022
Faafc04d9e69b73b9f49995fd4c94d4d?s=48 whatyouhide
0
200

Featured

See All Featured
In The Pink: A Labor of Love
E837d2996f52008ace055a08fbfff992?s=48 frogandcode
130
21k
Infographics Made Easy
282d599b414022eba5096510f675b6e2?s=48 chrislema
233
17k
Fontdeck: Realign not Redesign
0bce06bd06ee7a2c4f5500f25dcf7f18?s=48 paulrobertlloyd
73
4.1k
Fight the Zombie Pattern Library - RWD Summit 2016
9fa239b3154a0169d99ab7bf1422dd12?s=48 marcelosomers
226
15k
Art Directing for the Web. Five minutes with CSS Template Areas
433acaea1012b25d97ae66da9b998dad?s=48 malarkey
196
9.4k
Practical Orchestrator
168ccec72eee0530b818d44f3fedaacf?s=48 shlominoach
178
8.6k
VelocityConf: Rendering Performance Case Studies
96270e4c3e5e9806cf7245475c00b275?s=48 addyosmani
316
22k
Unsuck your backbone
B83d5b590577969ee79a5ad845411a7d?s=48 ammeep
659
55k
What the flash - Photography Introduction
5ce91fa49a613cbc3e20d5f96856473f?s=48 edds
61
10k
The Web Native Designer (August 2011)
0bce06bd06ee7a2c4f5500f25dcf7f18?s=48 paulrobertlloyd
74
1.9k
Building Your Own Lightsaber
Fe6b81005d1553accd6b2a28f6a2bef1?s=48 phodgson
94
4.6k
Designing the Hi-DPI Web
C157b16234f1e75e8eac3698c1d4414a?s=48 ddemaree
272
32k

Transcript

  1. 6/)"11:&9$&15*0/)"/%-*/( +VOJDIJ*UP

  2. 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

  3. *UJTWFSZTJNQMF CVU ➤ 4PNFQSPHSBNNFSTNJTVTFFYDFQUJPOIBOEMJOH ➤ 5IFZNJTVOEFSTUBOEl*GFYDFQUJPOIBQQFOT VTFASFTDVFA5IBU`TPLBZz ➤ 5IFZCFHJOXSJUJOHASFTDVFAFWFSZXIFSF ➤

    5IFZCFMJFWFl.ZQSPHSBNJTOPXSFMJBCMFz ➤/0! Twitter @jnchito / GitHub JunichiIto

  4. 40.&:&"34"(0 Twitter @jnchito / GitHub JunichiIto

  5. *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
  6. None

  7. 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

  8. $PODMVTJPO8IBUDBOXFMFBSOGSPNUIJTTUPSZ ➤ 5IFNJTVTFPGFYDFQUJPOIBOEMJOHMFBETUFSSJCMFDPOTFRVFODFT ➤ 8IBUZPVDBOEPBOEXIBUZPVTIPVME PSTIPVMEO`U EPBSFEJ⒎FSFOU ➤ *GZPVEPO`UDPOpEFODFJOFYDFQUJPOIBOEMJOHT 

    ➤ %0/05VTFASFTDVFATPDBTVBMMZ ➤ %FMFHBUFFYDFQUJPOIBOEMJOHUPGSBNFXPSLT QBHF MPHHJOH FUD  ➤ "TLNFOUPSTGPSIFMQBCPVUZPVSDPEFEFTJHO ➤ -FU`TEPIBQQZFYDFQUJPOIBOEMJOH❤ Twitter @jnchito / GitHub JunichiIto

  9. "#065.& ➤ +VOJDIJ*UP $BMMNF+VO  ➤ 4PGUXBSF&OHJOFFSBU4POJD(BSEFO*OD ➤ %FWFMPQJOH3BJMTBQQMJDBUJPOT ➤

    Twitter @jnchito ➤ GitHub JunichiIto

  10. 1&340/"-803,4 ➤ 5SBOTMBUFE&WFSZEBZ3BJMT5FTUJOHXJUI34QFD https://leanpub.com/everydayrailsrspec-jp

  11. 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.

  12. 5)"/,:06 Twitter @jnchito GitHub JunichiIto Book https://ruby-book.jnito.com/en