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
Rummaging around the stdlib
Search
jswanner
April 09, 2015
Programming
0
56
Rummaging around the stdlib
Presented at an ORUG meeting
jswanner
April 09, 2015
Tweet
Share
More Decks by jswanner
See All by jswanner
ActiveRecord Scopes & Arel [RailsWayCon Version]
jswanner
3
160
ActiveRecord Scopes & Arel
jswanner
6
1.2k
Other Decks in Programming
See All in Programming
GitHub Copilot and GitHub Codespaces Hands-on
ymd65536
2
150
はじめてのWeb API体験 ー 飲食店検索アプリを作ろうー
akinko_0915
0
130
Composerが「依存解決」のためにどんな工夫をしているか #phpcon
o0h
PRO
1
330
RailsGirls IZUMO スポンサーLT
16bitidol
0
190
すべてのコンテキストを、 ユーザー価値に変える
applism118
4
1.4k
Startups on Rails in Past, Present and Future–Irina Nazarova, RailsConf 2025
irinanazarova
0
200
Flutterで備える!Accessibility Nutrition Labels完全ガイド
yuukiw00w
0
170
Result型で“失敗”を型にするPHPコードの書き方
kajitack
5
980
ご注文の差分はこちらですか? 〜 AWS CDK のいろいろな差分検出と安全なデプロイ
konokenj
3
470
Rubyでやりたい駆動開発 / Ruby driven development
chobishiba
1
750
iOS 26にアップデートすると実機でのHot Reloadができない?
umigishiaoi
0
140
AI駆動のマルチエージェントによる業務フロー自動化の設計と実践
h_okkah
0
210
Featured
See All Featured
Testing 201, or: Great Expectations
jmmastey
43
7.6k
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
Designing Experiences People Love
moore
142
24k
Making the Leap to Tech Lead
cromwellryan
134
9.4k
Producing Creativity
orderedlist
PRO
346
40k
Gamification - CAS2011
davidbonilla
81
5.4k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
130
19k
Designing for humans not robots
tammielis
253
25k
Large-scale JavaScript Application Architecture
addyosmani
512
110k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.6k
Principles of Awesome APIs and How to Build Them.
keavy
126
17k
Making Projects Easy
brettharned
116
6.3k
Transcript
Rummaging around the stdlib Jacob Swanner @jswanner
Definition of stdlib
Not a library of these
Definition of stdlib • Ships with the language • Separate
from “core” • Opt-in parts of the language
Old Identification Scheme • Something you needed to `require` •
Doesn’t quite work anymore
New Identification Scheme • Use documentation • Core: http://ruby-doc.org/core-2.2.1/ •
stdlib: http://ruby-doc.org/stdlib-2.2.1/
Common Parts • base64 • csv • erb • fileutils
• json • logger • net/http • pathname • pp • securerandom • webrick • yaml
Confusing Parts: Time $ irb >> Time.new(2015, 4, 9) =>
2015-04-09 00:00:00 -0400 >> Time.parse('2015-04-09') NoMethodError: undefined method `parse' for Time:Class >> require 'time' => true >> Time.parse('2015-04-09') => 2015-04-09 00:00:00 -0400
Confusing Parts: Date $ irb >> Date.new(2015, 4, 9) NameError:
uninitialized constant Date >> require 'date' => true >> Date.new(2015, 4, 9) => #<Date: 2015-04-09 ((2457122j,0s,0n),+0s,2299161j)> >> Date.parse('2015-04-09') => #<Date: 2015-04-09 ((2457122j,0s,0n),+0s,2299161j)>
Confusing Parts: RubyGems $ irb >> Gem => Gem >>
require 'rails' => true $ ruby --disable-gems -S -- irb >> Gem NameError: uninitialized constant Gem >> require 'rails' LoadError: cannot load such file -- rails
Lesser Known: ipaddr $ irb -r ipaddr >> IPAddr.new('10.0.0.256') IPAddr::InvalidAddressError:
invalid address >> ip = IPAddr.new('10.0.0.10') => #<IPAddr: IPv4:10.0.0.10/255.255.255.255> >> ip.succ => #<IPAddr: IPv4:10.0.0.11/255.255.255.255> >> ip.ipv6? => false >> ip_range = ip.mask(24) => #<IPAddr: IPv4:10.0.0.0/255.255.255.0> >> ip_range.include?(ip) => true
Lesser Known: irb #!/usr/bin/env ruby require 'irb' # require application
code # perform application boot IRB.start(__FILE__)
Buried Treasure: FileList $ irb -r rake/file_list >> existing =
Rake::FileList.new("*.markdown") => ["a.markdown", "b.markdown", "c.markdown"] >> renamed = existing.ext(".md") => ["a.md", "b.md", "c.md"] >> existing.zip(renamed). ?> each { |from, to| FileUtils.mv(from, to) } => [["a.markdown", "a.md"], ["b.markdown", "b.md"], ["c.markdown", "c.md"]]
FileList, cont’d $ tree ├── lib/ │ ├── a.rb │
├── b.rb │ └── c.rb └── test/ ├── a_test.rb └── c_test.rb
FileList, cont’d $ irb -r rake/file_list >> source = Rake::FileList.new("lib/*.rb")
=> ["lib/a.rb", "lib/b.rb", "lib/c.rb"] >> tests = Rake::FileList.new("test/*_test.rb") => ["test/a_test.rb", "test/c_test.rb"] >> untested = source. ?> sub(‘lib/‘, 'test/').sub('.rb', '_test.rb'). ?> exclude { |f| tests.include?(f) } => ["test/b_test.rb"]
YAML::Store $ irb -r yaml/store >> store = YAML::Store.new("store.yml") =>
#<Psych::Store:0x007f9b8f5b2430 …> >> store.transaction do ?> store["people"] = ["dray", "jacob", "nate"] ?> store["time"] = Time.now ?> end => … >> store["people"] PStore::Error: not in transaction
YAML::Store, cont’d $ cat store.yml --- people: - dray -
jacob - nate time: 2015-04-09 16:23:58.394957000 -04:00
Quirky: un $ irb -I lib -r date $ irb
-Ilib -rdate
Quirky: un, cont’d ruby -run -e cp -- [OPTION] SOURCE
DEST ruby -run -e ln -- [OPTION] TARGET LINK_NAME ruby -run -e mv -- [OPTION] SOURCE DEST ruby -run -e rm -- [OPTION] FILE ruby -run -e mkdir -- [OPTION] DIR ruby -run -e rmdir -- [OPTION] DIR ruby -run -e install -- [OPTION] SOURCE DEST ruby -run -e touch -- [OPTION] FILE ruby -run -e wait_writable -- [OPTION] FILE ruby -run -e mkmf -- [OPTION] EXTNAME [OPTION] ruby -run -e httpd -- [OPTION] DocumentRoot ruby -run -e help [COMMAND]
Quirky: un, cont’d $ ruby -run -e httpd -- --port
8888 . & […] INFO WEBrick::HTTPServer#start: port=8888 $ curl "http://localhost:8888/store.yml" --- people: - dray - jacob - nate time: 2015-04-09 16:23:58.394957000 -04:00
Quirky: ubygems $ cat $RUBY_ROOT/lib/ruby/2.2.0/ubygems.rb # This file allows for
the running of rubygems with a nice # command line look-and-feel: ruby -rubygems foo.rb #-- # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others. # All rights reserved. # See LICENSE.txt for permissions. #++ require 'rubygems'
• CDC/ C. Goldsmith, P. Feorino, E. L. Palmer, W.
R. McManus http:// en.wikipedia.org/wiki/HIV/AIDS#/media/File:HIV-budding-Color.jpg • http://commons.wikimedia.org/wiki/User:Nephron http://en.wikipedia.org/wiki/ Herpes_simplex_virus#/media/File:Herpes_simplex_virus_pap_test.jpg • http://en.wikipedia.org/wiki/Chlamydia_infection#/media/ File:Pap_smear_showing_clamydia_in_the_vacuoles_500x_H%26E.jpg