isaksky

  def self.get_response_following_redirects orig_uri, requests_limit = 15
    raise "Input must be an absolute URI." unless orig_uri.is_a?(URI::Generic) && orig_uri.absolute?

    uri = orig_uri
    requests_made = 0
    while requests_made <= requests_limit
      response = Net::HTTP.get_response uri
      requests_made += 1
      case response
        when Net::HTTPSuccess

isaksky

require 'uri'
require 'net/http'

# From http://ruby-doc.org/stdlib-1.9.3/libdoc/net/http/rdoc/Net/HTTP.html#method-c-get_response
# Does not fully work!
def fetch(uri_str, limit = 10)
  # You should choose a better exception.
  raise ArgumentError, 'too many HTTP redirects' if limit == 0

  response = Net::HTTP.get_response(URI(uri_str))

isaksky

LETTERS = (65..90).collect{|char_code| char_code.chr}

def letter_combos length, accum = nil
  return accum if length == 0
  return accum || LETTERS if length == 1
  combos = (accum || LETTERS).product(LETTERS).inject([]) {|combos, product| 
    combos << product.first + product.last}     
  letter_combos(length - 1, combos)
end