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
Ruby by Example
Search
James Hughes
June 22, 2012
Programming
7
560
Ruby by Example
James Hughes
June 22, 2012
Tweet
Share
More Decks by James Hughes
See All by James Hughes
Functional Programming with Clojure
kouphax
1
110
Tyrannosaurus Rx
kouphax
0
110
React
kouphax
2
700
Play for (Java|Scala)
kouphax
0
110
Devops: A Case Study
kouphax
0
67
Scala for C# Developers
kouphax
5
2.6k
Dropwizard - Production Ready Web Services
kouphax
3
1.5k
Scala for Fun & Profit
kouphax
4
610
What Agile Means To Me
kouphax
0
120
Other Decks in Programming
See All in Programming
Асинхронность неизбежна: как мы проектировали сервис уведомлений
lamodatech
0
1.3k
生成AIでGitHubソースコード取得して仕様書を作成
shukob
0
630
オニオンアーキテクチャを使って、 Unityと.NETでコードを共有する
soi013
0
370
chibiccをCILに移植した結果 (NGK2025S版)
kekyo
PRO
0
110
はてなにおけるfujiwara-wareの活用やecspressoのCI/CD構成 / Fujiwara Tech Conference 2025
cohalz
2
2.6k
Fixstars高速化コンテスト2024準優勝解法
eijirou
0
190
Findy Team+ Awardを受賞したかった!ベストプラクティス応募内容をふりかえり、開発生産性向上もふりかえる / Findy Team Plus Award BestPractice and DPE Retrospective 2024
honyanya
0
140
Package Traits
ikesyo
1
200
shadcn/uiを使ってReactでの開発を加速させよう!
lef237
0
290
VisionProで部屋の明るさを反映させるシェーダーを作った話
segur
0
100
asdf-ecspresso作って 友達が増えた話 / Fujiwara Tech Conference 2025
koluku
0
1.3k
ISUCON14感想戦で85万点まで頑張ってみた
ponyo877
1
580
Featured
See All Featured
Dealing with People You Can't Stand - Big Design 2015
cassininazir
365
25k
Git: the NoSQL Database
bkeepers
PRO
427
64k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
230
52k
Embracing the Ebb and Flow
colly
84
4.5k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
251
21k
A Philosophy of Restraint
colly
203
16k
Making the Leap to Tech Lead
cromwellryan
133
9k
Become a Pro
speakerdeck
PRO
26
5.1k
Music & Morning Musume
bryan
46
6.3k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
47
5.1k
ピンチをチャンスに:未来をつくるプロダクトロードマップ #pmconf2020
aki_iinuma
113
50k
Making Projects Easy
brettharned
116
6k
Transcript
RUBY BY EXAMPLE
Ruby is... interpreted object oriented dynamic
Ruby is... productive intuitive popular
VARIABLES & TYPES
Before we begin... a.+(b) a.is_valid? a.decrement!
$counter @@counter @counter counter Global Class Instance Local
‘hello’ ‘’‘hello’’’ %q{hello} String Herestring Perl-inspired
a = ‘James’ b = “Hello #{a}” puts b =>
“Hello James”
:hello Symbol
puts <<DOC This is a "heredoc" Multi-line String DOC
[1,2,3] {:a=>1, :b=>2} {a: 1, b: 2} 0..10 Array Hash
(1.8) Hash (1.9) Ranges
METHODS
def greet(name) “Hello, #{name}” end greet “James”
def greet(name=“World”) “Hello, #{name}” end greet “James” greet
CONTROL FLOW
if rating >= 4 puts "great" elsif rating == 3
puts "alright" else puts "sucks" end
unless rating == 5 puts “Try harder” end
puts “Try harder” unless rating == 5 puts “Seriously” if
rating == 1
case rating when 4..5 puts "great" when 3 puts "alright"
else puts "sucks" end
while !le.has_more_lines? puts !le.next_line end puts !le.next_line while !le.has_more_lines?
until !le.end_of_!le? puts !le.next_line end puts !le.next_line until !le.end_of_!le?
for i in 0...!le.line_count puts !le.lines[i] end
BLOCKS
[1,2,3,4].each do |i| puts i end
array.each(&block)
printer = Proc.new do |i| puts i end [1,2,3,4].each &printer
printer = lambda { |i| puts i }
def loggerWrapper puts "Executing Method" yield puts "Done Executing" end
loggerWrapper { puts "Weeee!" }
COLLECTIONS
Array/Enumerable Operations 109 Hash Operations 50
[1,2,3,4,5].map { |i| i +1} [1,2,3,4,5].reduce { |i, j| i
+ j } ({a: '1'}).merge({b: '2'})
CLASSES
class Person def initialize(name, age) @name,@age = name,age end end
person = Person.new("James", 32)
class Person attr_accessor :name attr_accessor :age ... end p =
Person.new("James", 32) puts p.name, p.age
class Person ... end class Hero < Person attr_accessor :powers
end p = Hero.new("James", 32) p.powers = [“Flying”]
MODULES & MIXINS
module StrUtils def self.salt(pass, slt) “#{pass}#{salt}” end def salt(slt) StrUtils::salt(@value,
slt) end end
StrUtils::salt("123", "456")
class Password include Utils def initialize(value) @value = value end
end Password.new("test").salt
TOOLS OF THE TRADE
irb Interactive shell ruby Ruby interpreter gem Library manager rake
Build tool rails Web framework
RUBY BY EXAMPLE