notify.rb

#!/usr/bin/env ruby

# Created by _zsh for r/trees

require 'rubygems'
require 'hpricot'
require 'open-uri'
require 'growl'


subscribers = 0
TARGET = 123456

def scrape 
  open("http://www.reddit.com/r/trees") { |f| Hpricot(f) }
end
def find_subscribers doc, subscribers
  count = (doc/".titlebox .number").inner_html.gsub(/,/, '').to_i
  if count > subscribers
    subscribers = count
    notify subscribers
  end
  subscribers
end
def notify subscribers
  Growl.notify {
    self.title = "r/trees"
    self.message = "#{subscribers} subscribers\n"
    if subscribers == TARGET
      sticky!
    end
  }
end

while subscribers != TARGET
  doc = scrape
  subscribers = find_subscribers doc, subscribers
  sleep 30
end