Introducing the lothianbusestimetable gem

require 'lothianbusestimetable'

lbt = LothianBusesTimetable.new
lbt.fetch_timetable '44'
a = lbt.timetable[:weekday][:outbound]["Meadowbank House"]

Time.now #=> 2017-08-22 14:06:26 +0100 

# find the bus times for the 44 (for the next 40 minutes, 20 minutes from now) 
# from the bus stop near to Meadowbank House heading into town

a2 = a.select do |x| 
  t = Time.strptime(x, "%H%M")
  (t > Time.now + 60 * 20) and (t < Time.now + 60 * 60)
end

#=> ["1432", "1442", "1452", "1502"]