Simple, hacky ruby script to parse csv and provide a number for 2015

2015-lifting-totals.rb

#!/usr/bin/ruby

# Tested with ruby-2.0

# 1) Download CSV file with workout data
# 2) run this script as './2015-lifting-totals.rb <path to csv file>

require 'csv'

# Ugly HACK!
`grep ^2015 "#{ARGV[0]}" > /tmp/data.csv`

lbs = 0
CSV.foreach("/tmp/data.csv", converters: :numeric) do |row|
    volume = row[2] * row[4]
    #puts "Volume for #{row[1]} on #{row[0]} was: #{volume}"
    lbs += volume
end

# http://codereview.stackexchange.com/a/28100
whole, decimal = lbs.to_s.split(".")
whole_with_commas = whole.chars.to_a.reverse.each_slice(3).map(&:join).join(",").reverse
newlbs = [whole_with_commas, decimal].compact.join(".")

puts "2015 Volume is: #{newlbs}"

`rm -f /tmp/data.csv`