Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Sign up for free
Menu
Search
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Pricing
Search
Sign in
Sign up for free
Learn ruby with doukaku
Search
Sponsored
·
SiteGround - Reliable hosting with speed, security, and support you can count on.
→
Fumiaki MATSUSHIMA
April 28, 2016
Programming
2.1k
2
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
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
More Decks by Fumiaki MATSUSHIMA
See All by Fumiaki MATSUSHIMA
graphql-ruby を Spinel で速くしようとした話
mtsmfm
0
40
Omarchy Tokyo やると聞いて UMPC 買ってセットアップしてきた
mtsmfm
0
220
Learning from performance improvements on GraphQL Ruby
mtsmfm
1
1.4k
Ruby で作る Ruby (物理)
mtsmfm
1
320
GraphQL Ruby benchmark
mtsmfm
1
940
タイムアウトにご用心 / Timeout might break application state
mtsmfm
6
2.7k
Build REST API with GraphQL Ruby
mtsmfm
0
410
GraphQL Ruby をちょっとだけ速くした / Make graphql-ruby faster a bit
mtsmfm
1
810
Gaming PC on GCP
mtsmfm
0
820
Other Decks in Programming
See All in Programming
Unity6 URPによる海底をテーマにしたVJシステムの解説 | Unity Shader 完全に理解した 勉強会
gam0022
0
370
ChromeでローカルLLM
ryu1013
0
140
作れる、でも消せるか?──安全に「枯らして消す」機能削除術 / Drain, Then Delete
chobishiba
2
820
golang-bob.pdf
iwatsukayura
0
130
全ての永続トークンを、生まれる前に消し去りたい!
sylph01
2
990
SalesForceを内製化!? ~ HR事業を支える顧客管理基盤のインフラを大公開 ~
oku053
0
190
AI時代のコードレビューは人に向けるな、仕組みに向けろ
texmeijin
5
3.7k
re:Inventに行く前に知っておきたい現地参加のノウハウ
nokomoro3
0
440
Apple Intelligence を用いた個人情報誤送信防止、及びユーザーリクエスト体験の改善について
yukiny
0
350
Long Living Tokens, Die, Die, Die! (or: The One Ring is Banned in Modern)
sylph01
0
330
dotNET_vulnclicker_intro.pdf
deka_morita
0
150
Workers Cache を知る
syumai
0
370
Featured
See All Featured
The AI Revolution Will Not Be Monopolized: How open-source beats economies of scale, even for LLMs
inesmontani
PRO
3
3.8k
Game over? The fight for quality and originality in the time of robots
wayneb77
1
310
Prompt Engineering for Job Search
mfonobong
0
520
Leo the Paperboy
mayatellez
10
2.4k
KATA
mclloyd
PRO
35
16k
Raft: Consensus for Rubyists
vanstee
142
7.8k
We Have a Design System, Now What?
morganepeng
55
8.4k
A Guide to Academic Writing Using Generative AI - A Workshop
ks91
PRO
1
520
Pawsitive SEO: Lessons from My Dog (and Many Mistakes) on Thriving as a Consultant in the Age of AI
davidcarrasco
0
260
What does AI have to do with Human Rights?
axbom
PRO
1
2.5k
The Illustrated Guide to Node.js - THAT Conference 2024
reverentgeek
1
570
ReactJS: Keep Simple. Everything can be a component!
pedronauck
666
130k
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