case to class

cli-case.rb

#!/usr/bin/env ruby

case ARGV[0]
when "one"
  puts "hi"
when "two"
  puts "bye"
else
  puts "otherwise"
end

cli-class.rb

#!/usr/bin/env ruby

class App
  def one
    puts "hi"
  end
  
  def two
    puts "bye"
  end
  
  def method_missing(method, args = [])
    puts "otherwise"
  end
end

App.send(ARGV[0])