Calculates calculates the difference between time as HH:MM:SS.msec

time-diff.rb

#!/usr/bin/env ruby
# calculates the difference between time as 
# "HH:MM:SS.msec" and "HH:MM:SS.msec"
# into a file called diffs.txt

require "Time"

def time_diff(time1_str, time2_str)
  t = Time.at( Time.parse(time2_str) - Time.parse(time1_str) )
  (t - t.gmt_offset).strftime("%H:%M:%S.%L")
end


ins = File.open("ins.txt")
outs = File.open("outs.txt")
diffs = File.new("diffs.txt", "w")

inlines = Array.new
outlines = Array.new

ins.each { |l| inlines << l }
outs.each { |l| outlines << l }

inlines.zip(outlines).each { |ins, outs| diffs.puts time_diff(ins, outs) }

diffs.close