ActiveSupport Core Extension extends your creativity.

Transcript

1. ActiveSupport Core Extension extends your creativity. @m1sogi
2. @m1sogi Slack ͓͡͞Μ Ruby/PHP programmer C#, ڝϓϩ, Haskell, TypeScript
3. vscode rubocop plugin https://github.com/misogi/vscode-ruby-rubocop
4. Where is cool ruby code?
5. • Principle of Lease Surprise
 (࠷ۙ͸ͦ͏Ͱ΋ͳ͍) • ଟ༷ੑ
6. Ruby ActiveRecord ActionPack ActionView ActiveJob ActiveSupport My program! other gems
7. -ive support • Core extension • Autoload, Concern, Gzip, JSON, Logger, ProxyObject, …..
8. gem install activesupport irb -r active_support > require ‘active_support/core_ext’ > ’’.blank? => true Install
9. [1,2,3].inject(0) {|a, i| a + i} [1,2,3].inject(0, :+)
10. > [1,2,3].sum => 6 Open class!
11. arr.prepend(4) arr.unshift(4) == arr << 4 arr.push(4) == arr.append(4) “name”.starts_with?(‘s’) “name”.ends_with?(‘s’) “name”.start_with?(‘s’) “name”.end_with?(‘s’) == ==
12. arr.second arr[1] == arr[2] == arr.third arr.forty_two == arr[41] Equal to self[41]. 
 Also known as 
 accessing "the reddit". arr[-2] arr.second_to_last ==
13. Object#deep_dup
14. String
15. Class#class_attribute Meta programming! DPPLQBE
    ίʔσΟϯάඪ४
16. ActiveSupport -> Ruby ‘xml’.try!(:upcase) ‘xml’&.upcase s = <<DOC.strip_heredoc ग़ੈͷ֗ ͦΕ͸඿দ DOC s = <<~DOC ग़ੈͷ֗ ͦΕ͸඿দ DOC
17. For code reading
18. Conclusion • active_support ͷ
 Ґஔ͚ͮͱ 
 Rails ͷߟ͑ • ศརػೳʢΈͳ͞Μ΋ʣ • ίʔυϦʔσΟϯάʹ΋