gistfile1.rb

def extract_options_from(arguments)
  arguments.values_at *(indexes_for(arguments) - argument_indexes_for(arguments))
end

def extract_arguments_from(arguments)
  arguments.values_at *argument_indexes_for(arguments)
end

def indexes_for(arguments)
  (0...arguments.length).to_a
end

def argument_indexes_for(arguments)
  returning indexes_for(arguments) do |indexes|
    arguments.each_with_index do |argument, index|
      case argument
      when /^--.+=/
        indexes[index, 2] = [nil, nil]
      when /^-(-$)?/
        indexes[index] = nil
        break if $1
      end
    end
  end.compact
end