gistfile1.txt

from_date = Date.new(2015, 02,  1)
to_date = Date.civil(2015, 02, -1)

attendance_lines_by_date = File.open(ATTENDANCE_LINES_FILE)
                               .readlines
                               .map { |line_text| AttendanceLine.new line_text, ROSTER }
                               .select { |line| line.date >= from_date and line.date <= to_date }
                               .reject { |line| line.date.weekend? }
                               .group_by { |line| line.date }

# Get 2 earliest employees
new_lines = attendance_lines_by_date.map do |date|
  date.drop(1)[0]                                       # remove extraneous date. BOTCH - to be improved by Pac
      .reject { |line| line.time < Time.parse("6:00") } # time of day starts at 6AM
      .uniq { |line| line.staff }                       # unique the staff to get their first arrival time
      .take(2)                                          # get the first two employees
end