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
Search
Tadas Sce
March 01, 2014
Technology
4
150
Ruby
For non-rubyists
Tadas Sce
March 01, 2014
Tweet
Share
More Decks by Tadas Sce
See All by Tadas Sce
Can you trust your tests?
tadassce
0
87
Can you trust your tests?
tadassce
0
46
Other Decks in Technology
See All in Technology
強化されたAmazon Location Serviceによる新機能と開発者体験
dayjournal
2
210
Observability infrastructure behind the trillion-messages scale Kafka platform
lycorptech_jp
PRO
0
140
BrainPadプログラミングコンテスト記念LT会2025_社内イベント&問題解説
brainpadpr
1
160
より良いプロダクトの開発を目指して - 情報を中心としたプロダクト開発 #phpcon #phpcon2025
bengo4com
1
3.1k
“社内”だけで完結していた私が、AWS Community Builder になるまで
nagisa53
1
380
Prox Industries株式会社 会社紹介資料
proxindustries
0
280
監視のこれまでとこれから/sakura monitoring seminar 2025
fujiwara3
11
3.9k
第9回情シス転職ミートアップ_テックタッチ株式会社
forester3003
0
230
製造業からパッケージ製品まで、あらゆる領域をカバー!生成AIを利用したテストシナリオ生成 / 20250627 Suguru Ishii
shift_evolve
PRO
1
140
Amazon S3標準/ S3 Tables/S3 Express One Zoneを使ったログ分析
shigeruoda
3
470
「Chatwork」の認証基盤の移行とログ活用によるプロダクト改善
kubell_hr
1
150
250627 関西Ruby会議08 前夜祭 RejectKaigi「DJ on Ruby Ver.0.1」
msykd
PRO
2
270
Featured
See All Featured
[RailsConf 2023] Rails as a piece of cake
palkan
55
5.6k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
107
19k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
44
2.4k
Large-scale JavaScript Application Architecture
addyosmani
512
110k
How to train your dragon (web standard)
notwaldorf
93
6.1k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
A Modern Web Designer's Workflow
chriscoyier
694
190k
Code Review Best Practice
trishagee
68
18k
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
194
16k
Principles of Awesome APIs and How to Build Them.
keavy
126
17k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
20
1.3k
Fireside Chat
paigeccino
37
3.5k
Transcript
{ title: Ruby, for: "non-rubyists", by: "Tadas Ščerbinskas" }
class Ruby def what? "A dynamic, open source programming language
" + "with a focus on simplicity and productivity. " + "It has an elegant syntax that is " + "natural to read and easy to write." end end
class Ruby def what_for? { web: ["Rails", "Sinatra", "Padrino"], desktop:
["MacRuby", "IronRuby"], mobile: ["RubyMotion", "MobiRuby", "Ruboto"] } end end
# Basics ! puts "Hello VilniusRB!" # => nil #
>> Hello VilniusRB! ! "Hi".class # => String 1.class # => Fixnum nil.class # => NilClass
# Numbers ! -4 # => -4 1.5 # =>
1.5 12.3e-3 # => 0.0123 0b101 # => 5 (bin) 0x11 # => 17 (hex) 020 # => 16 (oct) 12_000 # => 12000 10**20 # => 100000000000000000000
# Numbers ! -4.class # => Fixnum 1.5.class # =>
Float 12.3e-3.class # => Float 0b101.class # => Fixnum 0x11.class # => Fixnum 020.class # => Fixnum 12_000.class # => Fixnum (10**20).class # => Bignum
# Numbers ! 4.even? # => true 3.zero? # =>
false 3.next # => 4 ! 3.times do print "Hello " end ! # >> Hello Hello Hello
# Numbers ! 2 + 2 # => 4 !
2.+(2)
# Strings and symbols ! "foo #{1 + 2}" #
=> "foo 3" 'foo #{1 + 2}' # => "foo \#{1 + 2}" ! :foo # => :foo ! "foo".object_id == "foo".object_id # => false :foo.object_id == :foo.object_id # => true
# Strings and symbols ! "stressed".reverse # => "desserts" "vilnius".capitalize
# => "Vilnius" "patience".length # => 8 " nu ".strip # => "nu" "Lietuva".start_with? "Liet" # => true :ruby.upcase # => :RUBY
# Strings and symbols ! "I like coffee".sub("coffee", "beer") #
=> "I like beer" ! s = "I really really like ruby" s.split.count("really") # => 2
# Collections ! [1, 2, 3] # Array ! 1..10
# Range ! { :foo => 11, :bar => 12 } # Hash ! { foo: 11, bar: 12 } # Hash
# Collections ! cities = %w[London Oslo Paris Amsterdam Berlin]
visited = %w[Berlin Oslo] puts "I still need to visit: ", cities - visited ! # >> I still need to visit: # >> London # >> Paris # >> Amsterdam
# Collections ! (1..10).select(&:even?) # => [2, 4, 6, 8,
10] ! ["Tom", "Jerry"].join "&" # => "Tom&Jerry" ! [1, 2, 3].shuffle # => [3, 1, 2] ! [1, 1, 2, 1, 2].uniq # => [1, 2] ! [1, 2, 3].include?(2) # => true
# Variables ! monster # is a local variable !
Monster # is a constant ! @monster # is an instance variable ! @@monster # is a class variable ! $monster # is a global variable
# Variables ! a, b, c = 1, 2, 3
! a, b = b, a
# Conditionals ! puts "Hello" if monster.has_ears? ! puts "Hello"
unless monster.asleep?
# Conditionals ! if monster.big? puts "AAaah! run!!" elsif monster.medium?
puts "Be careful" else puts "Don't sweat it" end
# Conditionals ! case monster.size when :big puts "AAaah! run!!"
when :medium puts "Be careful" else puts "Don't sweat it" end
# Conditionals ! case monster.size when :big then puts "AAaah!
run!!" when :medium then puts "Be careful" else puts "Don't sweat it" end
# Blocks ! names = %w[Emily Eva Mia] names.each do
|name| puts "Hi #{name}!" end ! # >> Hi Emily! # >> Hi Eva! # >> Hi Mia!
# Blocks ! names = %w[Emily Eva Mia] names.each {
|name| puts "Hi #{name}!" } ! ! ! # >> Hi Emily! # >> Hi Eva! # >> Hi Mia!
# Blocks ! def with_time puts "Started at #{Time.now}" yield
puts "Finished at #{Time.now}" end ! with_time { sleep 2 } ! # >> Started at 2014-03-01 00:50:19 +0200 # >> Finished at 2014-03-01 00:50:21 +0200
class Monster def initialize(name) @name = name end end
module Tail def wiggle puts "wiggling" end end ! class
Monster include Tail end ! Monster.new("Swamp Donkey").wiggle
# Monkey patching ! 2 + 2 # => 4
! class Fixnum def +(x) 42 end end ! 2 + 2 # => 42
# Refinements ! module Evil refine Fixnum do def +(x)
42 end end end
# Refinements ! 2 + 2 # => 4 !
using Evil ! 2 + 2 # => 42
# Meta-programming class Shape attr_reader :dimensions ! def initialize(dimensions =
{}) @dimensions = dimensions end ! def width dimensions[:width] end ! def height dimensions[:height] end end
# Meta-programming class Shape attr_reader :dimensions ! def initialize(dimensions =
{}) @dimensions = dimensions end ! [:width, :height].each do |dim| define_method(dim) do dimensions[dim] end end end
# Thank you ! ! { name: "Tadas Ščerbinskas", email:
"
[email protected]
", twitter: "tadassce", github: "tadassce" }
# Užduotis ! # Sukurkite Template klasę, turinčią body #
metodą, kuri grąžins HTML'ą su paduotu # turiniu viduje.
references = %w[ https://www.ruby-lang.org http://en.wikipedia.org/wiki/Ruby_(programming_language) https://speakerdeck.com/davidfrancisco/learning-ruby ]