hacknight.rb

#!/usr/bin/ruby

require 'rubygems'
require 'fastercsv'

meeting_times = []

FasterCSV.foreach("night.csv") do |row|
  row[1].split(",").each do |time|
    row[2].split(",").each do |day|
      row[3].split(",").each do |loc|
        meeting_times << "#{time.strip} #{day.strip} #{loc.strip}"
      end
    end
  end
end

meeting_times_count = {}

meeting_times.each do |time|
  meeting_times_count[time] ||= 0
  meeting_times_count[time] += 1
end

meeting_times_count.sort {|a,b| b[1]<=>a[1]}.each {|time| puts "#{time[1]}: #{time[0]}"}