irc-counter.rb

#!/usr/bin/env ruby

require "socket"

puts "Connecting to IRC..."
irc = TCPSocket.open('irc.freenode.net', 6667)
irc.send("USER blah blah blah :blah blah\n", 0)
irc.send("NICK ChanScanBot\n", 0)

puts "Joining #sproutcore"
irc.send("JOIN #sproutcore\n", 0)

puts "Getting list of active users"
names = []
until irc.eof?
  data = irc.gets
  break if data =~ /^:\S+ 366/ # End of NAMES
  if data =~ /^:\S+ 353/       # NAMES
    names += data.split(':').last.split(' ')
  end
end
names.delete_if{|n| n =~ /ChanScanBot/}

puts "Disconnecting"
irc.send("QUIT\n", 0)

puts "#{names.count} Users"