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 Stdlib – Minsk.rb October 2012
Search
Sergey Nartimov
October 27, 2012
Programming
10
370
Ruby Stdlib – Minsk.rb October 2012
Sergey Nartimov
October 27, 2012
Tweet
Share
More Decks by Sergey Nartimov
See All by Sergey Nartimov
PubSub at Rails
lest
0
120
Rails in production - RubyConfBY 22 Mar 2015
lest
1
150
Sequel - BRUG 21 Feb 2015
lest
0
83
Elixir – Belarus Ruby User Group 25 Jan 2014
lest
3
660
Authentication Security – RUBYSPB
lest
2
170
Geospatial applications on Rails
lest
8
410
Design patterns – Belarus Ruby on Rails User Group 23 Feb 2013
lest
8
650
Background jobs with realtime results – RailsClub'Moscow 2012
lest
5
210
Other Decks in Programming
See All in Programming
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
1
430
Back to the Future: Let me tell you about the ACP protocol
terhechte
0
120
ABEMAモバイルアプリが Kotlin Multiplatformと歩んだ5年 ─ 導入と運用、成功と課題 / iOSDC 2025
akkyie
0
310
非同期jobをtransaction内で 呼ぶなよ!絶対に呼ぶなよ!
alstrocrack
0
480
ネイティブ製ガントチャートUIを作って学ぶUICollectionViewLayoutの威力
jrsaruo
0
120
Django Ninja による API 開発効率化とリプレースの実践
kashewnuts
0
890
Swift Concurrency - 状態監視の罠
objectiveaudio
2
440
iOSエンジニア向けの英語学習アプリを作る!
yukawashouhei
0
160
AIエージェント時代における TypeScriptスキーマ駆動開発の新たな役割
bicstone
4
1.5k
Web Components で実現する Hotwire とフロントエンドフレームワークの橋渡し / Bridging with Web Components
da1chi
3
1.5k
タスクの特性や不確実性に応じた最適な作業スタイルの選択(ペアプロ・モブプロ・ソロプロ)と実践 / Optimal Work Style Selection: Pair, Mob, or Solo Programming.
honyanya
2
130
CSC305 Lecture 04
javiergs
PRO
0
230
Featured
See All Featured
Agile that works and the tools we love
rasmusluckow
331
21k
How to train your dragon (web standard)
notwaldorf
96
6.3k
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
4k
Making the Leap to Tech Lead
cromwellryan
135
9.5k
Why You Should Never Use an ORM
jnunemaker
PRO
59
9.5k
The Language of Interfaces
destraynor
162
25k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
32
2.2k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.5k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
188
55k
Speed Design
sergeychernyshev
32
1.1k
Bootstrapping a Software Product
garrettdimon
PRO
307
110k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
Transcript
Ruby Stdlib Sergey Nartimov Brainspec https://github.com/lest twitter: @just_lest
About me • Rails, Rubinius, Elixir contributor • Software engineer
at Brainspec • Consulting, training, development Sergey Nartimov Brainspec https://github.com/lest twitter: @just_lest
Struct
Struct class Point < Struct.new(:x, :y) end
Struct class Point < Struct.new(:x, :y) end point = Point.new(4,
2)
Struct class Point < Struct.new(:x, :y) end point = Point.new(4,
2) point.x # => 4 point.y # => 2
Struct class Point < Struct.new(:x, :y) end point = Point.new(4,
2) point.x # => 4 point.y # => 2 point.z # NoMethodError
OStruct
OStruct require 'ostruct'
OStruct require 'ostruct' point = OStruct.new(x: 4, y: 2)
OStruct require 'ostruct' point = OStruct.new(x: 4, y: 2) point.x
# => 4 point.y # => 2
OStruct require 'ostruct' point = OStruct.new(x: 4, y: 2) point.x
# => 4 point.y # => 2 point.z # => nil
OStruct require 'ostruct' point = OStruct.new(x: 4, y: 2) point.x
# => 4 point.y # => 2 point.z # => nil point.z = 0
Set
Set input = [1, -2, 2, 3]
Set input = [1, -2, 2, 3] results = []
input.each do |value| results << value.abs end
Set input = [1, -2, 2, 3] results = []
input.each do |value| results << value.abs end results # => [1, 2, 2, 3]
Set input = [1, -2, 2, 3] results = []
input.each do |value| results << value.abs end results.uniq # => [1, 2, 3]
Set input = [1, -2, 2, 3] results = []
input.each do |value| results << value.abs unless ... end results # => [1, 2, 3]
Set require 'set'
Set require 'set' input = [1, -2, 2, 3]
Set require 'set' input = [1, -2, 2, 3] results
= Set.new input.each do |value| results << value.abs end
Set require 'set' input = [1, -2, 2, 3] results
= Set.new input.each do |value| results << value.abs end results # => #<Set: {1, 2, 3}>
SortedSet require 'set' set = SortedSet.new set << 1 set
<< 3 set << 2
SortedSet require 'set' set = SortedSet.new set << 1 set
<< 3 set << 2 output = [] set.each do |value| output << value end output # => [1, 2, 3]
Shellwords
Shellwords pattern = 'belongs_to :user'
Shellwords pattern = 'belongs_to :user' escaped = Shellwords.escape(pattern) system("grep -r
#{escaped} app/models")
Shellwords pattern = 'belongs_to :user' escaped = Shellwords.escape(pattern) system("grep -r
#{escaped} app/models") escaped = pattern.shellescape system("grep -r #{escaped} app/models")
Shellwords argv = ['grep', '-r', 'belongs_to :user', 'app/models']
Shellwords argv = ['grep', '-r', 'belongs_to :user', 'app/models'] system(argv.map(&:shellescape).join(' '))
Shellwords argv = ['grep', '-r', 'belongs_to :user', 'app/models'] system(argv.map(&:shellescape).join(' '))
Shellwords argv = ['grep', '-r', 'belongs_to :user', 'app/models'] system(argv.map(&:shellescape).join(' '))
system(Shellwords.join(argv))
Shellwords argv = ['grep', '-r', 'belongs_to :user', 'app/models'] system(argv.map(&:shellescape).join(' '))
system(Shellwords.join(argv)) system(argv.shelljoin)
Shellwords cmd = 'grep -r "belongs_to :user" app/ models'
Shellwords cmd = 'grep -r "belongs_to :user" app/ models' Shellwords.split(cmd)
# => ["grep", "-r", "belongs_to :user", "app/models"]
Shellwords cmd = 'grep -r "belongs_to :user" app/ models' Shellwords.split(cmd)
# => ["grep", "-r", "belongs_to :user", "app/models"] cmd.shellsplit # => ["grep", "-r", "belongs_to :user", "app/models"]
SecureRandom
SecureRandom require 'securerandom'
SecureRandom require 'securerandom' SecureRandom.base64 # => "7lM0q9QF8oYvq20WSGOmOw=="
SecureRandom require 'securerandom' SecureRandom.base64 # => "7lM0q9QF8oYvq20WSGOmOw==" SecureRandom.hex # =>
"c0cff5ead6260fe58ebd4ddab83a3497"
SecureRandom require 'securerandom' SecureRandom.base64 # => "7lM0q9QF8oYvq20WSGOmOw==" SecureRandom.hex # =>
"c0cff5ead6260fe58ebd4ddab83a3497" SecureRandom.uuid # => "4b6ff327-cb9f-43e2-a067-342072b144bd"
Delegator
Delegator class Person < Struct.new(:name) end person = Person.new('John')
Delegator class Person < Struct.new(:name) end person = Person.new('John') redditor
= Reddittor.new(person)
Delegator class Person < Struct.new(:name) end person = Person.new('John') redditor
= Reddittor.new(person) redditor.name # => 'John'
Delegator class Person < Struct.new(:name) end person = Person.new('John') redditor
= Reddittor.new(person) redditor.name # => 'John' redditor.submit_link # => 'Link by John'
Delegator require 'delegate'
Delegator class Redditor < Delegator def initialize(person) end end
Delegator class Redditor < Delegator def initialize(person) end def __setobj__(person)
@person = person end def __getobj__ @person end end
Delegator class Redditor < Delegator def initialize(person) __setobj__(person) end def
__setobj__(person) @person = person end def __getobj__ @person end end
Delegator class Redditor < Delegator def initialize(person) __setobj__(person) end def
__setobj__(person) @person = person end def __getobj__ @person end def submit_link "Link by #{name}" end end
Delegator person = Person.new('John') redditor = Redditor.new(person) redditor.name # =>
'John' redditor.submit_link # => 'Link by John'
tl;dr
Delegator class Redditor < SimpleDelegator def initialize(person) super(person) end def
submit_link "Link by #{name}" end end
Delegator person = Person.new('John') redditor = Redditor.new(person) redditor.name # =>
'John'
Delegator person = Person.new('John') redditor = Redditor.new(person) redditor.name # =>
'John' redditor.methods.grep(/name/) # => [:name, :name=]
Delegator person = Person.new('John') redditor = Redditor.new(person) redditor.name # =>
'John' redditor.methods.grep(/name/) # => [:name, :name=] Redditor.instance_methods.grep(/name/) # => []
Delegator class Redditor < DelegateClass(Person) def initialize(person) super(person) end def
submit_link "Link by #{name}" end end
Delegator class Redditor < DelegateClass(Person) def initialize(person) super(person) end def
submit_link "Link by #{name}" end end Redditor.instance_methods.grep(/name/) # => [:name, :name=]
Thanks! Sergey Nartimov Brainspec https://github.com/lest twitter: @just_lest