Count the hours

count.rb

#!/usr/bin/env ruby -wKU

# Textmate command
# Given a number in square brackets, add up all these numbers and give us the total.
# Used to add up my time extimation documents

# example.txt
# Go this [1.5]
# Do that [2]

# output is "2.5 hours"

regex = /\[\D*(\d+\.*\d*)\]/

hours = 0.0
STDIN.read.scan(regex).each do |time|
  hours += time.first.to_f
end

print "#{hours} hours"