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
Learn ruby with doukaku
Search
Fumiaki MATSUSHIMA
April 28, 2016
Programming
2
2k
Learn ruby with doukaku
西日暮里.rb ゴールデンだよLT大会 @ 秋葉原UDX!!
Fumiaki MATSUSHIMA
April 28, 2016
Tweet
Share
More Decks by Fumiaki MATSUSHIMA
See All by Fumiaki MATSUSHIMA
Learning from performance improvements on GraphQL Ruby
mtsmfm
1
1.2k
Ruby で作る Ruby (物理)
mtsmfm
1
220
GraphQL Ruby benchmark
mtsmfm
1
850
タイムアウトにご用心 / Timeout might break application state
mtsmfm
6
2.6k
Build REST API with GraphQL Ruby
mtsmfm
0
340
GraphQL Ruby をちょっとだけ速くした / Make graphql-ruby faster a bit
mtsmfm
1
750
Gaming PC on GCP
mtsmfm
0
740
How to introduce GraphQL to an existing React-Redux application
mtsmfm
1
260
Canary release in StudySapuri
mtsmfm
0
3.1k
Other Decks in Programming
See All in Programming
iOSアプリの信頼性を向上させる取り組み/ios-app-improve-reliability
shino8rayu9
0
150
実践AIチャットボットUI実装入門
syumai
7
2.5k
Local Peer-to-Peer APIはどのように使われていくのか?
hal_spidernight
2
450
Pull-Requestの内容を1クリックで動作確認可能にするワークフロー
natmark
2
460
プログラミングどうやる? ~テスト駆動開発から学ぶ達人の型~
a_okui
0
190
WebエンジニアがSwiftをブラウザで動かすプレイグラウンドを作ってみた
ohmori_yusuke
0
170
Web技術を最大限活用してRAW画像を現像する / Developing RAW Images on the Web
ssssota
2
1.2k
Model Pollution
hschwentner
1
180
Le côté obscur des IA génératives
pascallemerrer
0
120
XP, Testing and ninja testing ZOZ5
m_seki
3
310
(Extension DC 2025) Actor境界を越える技術
teamhimeh
1
230
開発者への寄付をアプリ内課金として実装する時の気の使いどころ
ski
0
350
Featured
See All Featured
Testing 201, or: Great Expectations
jmmastey
45
7.7k
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
danielanewman
229
22k
4 Signs Your Business is Dying
shpigford
185
22k
Unsuck your backbone
ammeep
671
58k
Gamification - CAS2011
davidbonilla
81
5.5k
Learning to Love Humans: Emotional Interface Design
aarron
274
40k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
Speed Design
sergeychernyshev
32
1.1k
Building Applications with DynamoDB
mza
96
6.6k
Building Adaptive Systems
keathley
43
2.8k
The Art of Programming - Codeland 2020
erikaheidi
56
14k
Fireside Chat
paigeccino
40
3.7k
Transcript
(株)永和システムマネジメント @mtsmfm 松島 史秋 どう書くで学ぶ Ruby
松島 史秋 GitHub, Twitter, Nintendo ID @mtsmfm
None
どう書く
https://yhpg.doorkeeper.jp/
http://nabetani.sakura.ne.jp/hena/orde03nofconv/
多角形の頂点のうち、 内角が180度より小さいも のの数を計算する プログラムを書け。
スタート!!!
...
1時間後
Emoji provided free by Emoji One
Emoji provided free by Emoji One
できても できなくても 発表
Emoji provided free by Emoji One
おもしろい!
None
1時間という枠
素振り重要 Photo by cambodia4kidsorg
文字列操作
どう書くの 入力は 文字列
/*0*/ test( "1a2t3s2s", "11" ); /*1*/ test( "1a1c1d00", "22" );
/*2*/ test( "00", "20" ); /*3*/ test( "3q", "6" ); /*4*/ test( "3t2a", "8" ); /*5*/ test( "3t3a", "8" ); /*6*/ test( "3t4a", "12" ); /*7*/ test( "004q2g", "32" ); /*8*/ test( "4c2g2k4i", "24" ); /*9*/ test( "1o1a4f4i1t", "26" ); /*10*/ test( "4t3a4g2a2o2p", "24" ); /*11*/ test( "4i4o3i3c3n3h2c", "30" ); /*12*/ test( "4m3n3m002b1b3a", "34" ); /*13*/ test( "001b2a3t4s3s2s1s", "27" ); /*14*/ test( "1n1j3o4o1h2n2r1k", "36" ); /*15*/ test( "4o2a2j1m2e4l2l3m3o", "42" );
String#scan '1a2t3s2s'.scan(/\d\w/) #=> ["1a", "2t", "3s", "2s"]
String#chars
String#ord Integer#chr ?a.ord #=> 97 97.chr #=> "a"
配列操作
Array#zip Array#rotate
Array#combination a = [1, 2, 3, 4] a.combination(1).to_a => [[1],[2],[3],[4]]
a.combination(2).to_a => [[1,2],[1,3],[1,4],[2,3],[2,4],[3,4]] a.combination(3).to_a => [[1,2,3],[1,2,4],[1,3,4],[2,3,4]] a.combination(4).to_a => [[1,2,3,4]]
Array#transpose [ [1,2], [3,4], [5,6] ].transpose => [[1, 3, 5],
[2, 4, 6]]
Enumerable#each_slice Enumerable#each_cons
&.
Ruby 組込みだけで 超便利!
便利 gem
gem 'activesupport', require: 'active_support/all'
あれ? AS だっけ? 標準だっけ?
Emoji provided free by Emoji One
gem 'pry-rescue'
例外上がった ところで 止まる
Bundler
require 'bundler/inline' gemfile do source 'https://rubygems.org' gem 'activesupport', require: 'active_support/all'
end
結果の共有に 便利
フィードバック
'1a2t3s2s'.scan(/\d\w/) #=> ["1a", "2t", "3s", "2s"]
'1a2t3s2s'.scan(/../) #=> ["1a", "2t", "3s", "2s"]
'1a2t3s2s'.scan(/../) #=> ["1a", "2t", "3s", "2s"] Emoji provided free by
Emoji One
別言語で解く
Ruby の表現力
“Rubyをキメると 気持ちいい” - matz