byingyang

#!/usr/bin/env ruby

# this line imports the libpcap ruby bindings
require 'pcaplet'

# create packet sniffer on the wireless card
network = Pcaplet.new('-s 1500 -i en0')
# we only need to look at web packets
www_filter = Pcap::Filter.new('tcp and dst port 80', network.capture)
network.add_filter(www_filter)

byingyang

#!/usr/bin/env ruby

# this line imports the libpcap ruby bindings
require 'rubygems'
require 'pcap'
require 'pcaplet'
require 'socket'

# thread safe... but we're counting on the fact that the sniffer won't begin again until we're at least
# partially requesting the song (the GET keyword has already been written by the time the network listener is listening again)

byingyang

# C-Snake's Ruby
# Commonly used contest code
# 
# Last updated: 3-1-2010
import math

def fib(n):
 '''Returns the nth fibonacci number O(n)'''
 a, b = 0, 1
 i = 1

byingyang

> Lines beginning with `>` are comments. 
> Comments and empty lines are ignored.
>
> Each command is defined on a single line comprised of:
> 
>   1. a case-insensitive, alpha-numeric trigger followed 
>      by whitespace
>   2. a url followed by whitespace (if the url contains 
>      spaces they must be encoded as `%20`)
>   3. a short description

byingyang

# format:
# --------------
# date (mm/dd/yy)
# assignment
# assignment
# ...
#
# date
# assignment
# ...

byingyang

#!/usr/bin/env ruby
chapter, section, question = ARGV
letter = ('a'[0] + section.to_i - 1).chr
`open 'http://calcchat.tdlc.com/calcchat/printsolution.jsp?roomName=Calculus%208e%20#{chapter}.#{section}%20Ex%20#{question}&artName=se#{'%02d' % chapter}#{letter}01#{'%03d' % question}&chapFolder=#{'%02d' % chapter}&secFolder=#{letter}&solutionPath=http://calcchat.tdlc.com/solutionart/calc8e/'`

byingyang

#!/usr/bin/env ruby

def unused_images(image_path_dir, search_dirs)
  img_fns = Dir.glob("#{image_path_dir}**/*.*")
  search_dirs.each {|sd| img_fns.delete_if{|img_fn| `grep -r '#{File.basename(img_fn)}' #{sd}` != ""}}
  return img_fns
end

if ARGV.size < 2
  puts "Usage: image_cleanup path_to_images path_to_search ..."