hourly-week-distribution

#!/usr/bin/env ruby

# Given STDIN of unix timestamps (one or more per line),
# analyze the weekly distribution at hourly granularity.

day_counts_by_hour = []

$stdin.each_line do |line|
  next if line.chomp.empty?

  line.split(/\s/).each do |timestamp_string|
    timestamp = Integer(timestamp_string.chomp)
    time = Time.at(timestamp)

    # hourly_stats[time.hour] += 1
    # daily_stats[time.wday] += 1

    day_counts_by_hour[time.hour] ||= Array.new(7, 0)
    day_counts_by_hour[time.hour][time.wday] += 1
  end
end

day_counts_by_hour.each_with_index do |day_counts, hour|
  puts "#{hour}:\t" + day_counts.join("\t")
end