| #!/usr/bin/env ruby | |
| REPO_URLS = %w{ | |
| https://github.com/rubyforgood/casa | |
| https://github.com/rubyforgood/cep-backend | |
| https://github.com/rubyforgood/cep-ui | |
| https://github.com/rubyforgood/circulate | |
| https://github.com/rubyforgood/human-essentials | |
| https://github.com/rubyforgood/shelter-assist |
| #!/usr/bin/env ruby | |
| module M | |
| class << self | |
| attr_accessor :foo | |
| end | |
| end | |
| class C1 | |
| def call |
| #!/usr/bin/env ruby | |
| # Run in directory containing `compar.c`, e.g. from https://github.com/ruby/ruby/blob/master/compar.c. | |
| require 'etc' | |
| WORDS = Ractor.make_shareable File.readlines('/usr/share/dict/words').map(&:chomp).map(&:downcase).sort | |
| TRY_COUNT = Etc.nprocessors | |
| puts "Measuring first sequentially on main ractor and then with #{TRY_COUNT} ractors:\n\n" |
| #!/usr/bin/env ruby | |
| # strip-zero-width-spaces.rb | |
| # | |
| # Removes Unicode "\u200B" zero width spaces; useful for copying source code from O'Reilly learning books | |
| # | |
| # Usage: | |
| # | |
| # strip-zero-width-spaces.rb < original_file > new_stripped_file |
| #!/usr/bin/env ruby | |
| def bsearch(array, search_value) | |
| lower_bound = 0 | |
| upper_bound = array.length - 1 | |
| n = 0 | |
| while lower_bound < upper_bound | |
| n += 1 |
| #!/usr/bin/env ruby | |
| # -------------------------------------------------------------------------------- | |
| # test_iteration_constructs.rb | |
| # | |
| # Illustrates differences in behavior of some iteration constructs. | |
| # @keithrbennett, 2021-02-01 | |
| # | |
| # Output is: | |
| # |
| #!/usr/bin/env ruby | |
| # git-project-url | |
| # | |
| # Outputs to stdout the project URL corresponding to a git remote URL. | |
| # | |
| # Example: | |
| # | |
| # (`open` is for Mac, use `xdg-open` on Linux, `start` on Windows) | |
| # open $(git-project-url) # Opens 'origin' project page ('origin' is default) |
| #!/usr/bin/env ruby | |
| require 'amazing_print' | |
| require 'etc' | |
| require 'set' | |
| require 'shellwords' | |
| require 'yaml' | |
| raise "This script requires Ruby version 3 or later." unless RUBY_VERSION.split('.').first.to_i >= 3 |
Some practical application of these concepts can be seen in my "Writing a Command Line Application in Ruby" presentation at Paris.rb Conf in 2018 (https://www.youtube.com/watch?v=zMzzKOecvaA).
| #!/usr/bin/env ruby | |
| if ARGV.empty? | |
| raise 'Syntax is: split-video-to-photos video_file_spec' | |
| end | |
| def run_command(command) | |
| puts command | |
| IO.popen(command).each { |line| puts line } | |
| end |