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Exercise 1.11

(define (recursive-f n)
  (if (< n 3)
    n
    (+ (recursive-f (- n 1))
                    (* 2 (recursive-f (- n 2)))
		    (* 3 (recursive-f (- n 3))))))

oscardelben

Exercise 1.14

Order of growth is O(3n) NOTE: this is my result by I've seen elsewhere different results.

Exercise 1.15

p is evaluated 5 times

order of growth is O(log n) because the amount of resource needed is constant.

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module ActiveRecord
  module Acts
    module TaggableOn
      module SingletonMethods
        def find_options_for_tag_counts(options = {})
          options.assert_valid_keys :start_at, :end_at, :conditions, :at_least, :at_most, :order, :limit, :on, :id
  
          scope = scope(:find)
          start_at = sanitize_sql(["#{Tagging.table_name}.created_at >= ?", options.delete(:start_at)]) if options[:start_at]
          end_at = sanitize_sql(["#{Tagging.table_name}.created_at <= ?", options.delete(:end_at)]) if options[:end_at]

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import oauth.oauth as oauth
import httplib

class ZooppaClient(object):
    # consumer_key, consumer_secret are your api key and secret as strings
    def __init__(self, consumer_key, consumer_secret):
      self.consumer = oauth.OAuthConsumer(consumer_key, consumer_secret)
      self.host = 'localhost'
      self.port = 3000
      if self.port == 80:

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  def oauth
    OAuth::Consumer.new(
      consumer_key,
      consumer_secret,
        {
          :site                 => 'https://api.login.yahoo.com', 
          :scheme               => :query_string, 
          :http_method          => :get, 
          :request_token_path   => '/oauth/v2/get_request_token', 
          :access_token_path    => '/oauth/v2/get_token', 

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def distribution_chart_helper(width,height,sent,click, hist_sent, hist_click)
  max_val = [sent,click, 1].max
  hist_max_val = [hist_sent, hist_click, 1].max
  
  hist_sent = max_val.to_f * hist_sent / hist_max_val.to_f
  hist_click = max_val.to_f * hist_click / hist_max_val.to_f
  
  data = [sent,click, hist_sent, hist_click].map{|d| [d,0.01].max}.join("|")
  legend = "sent|clicks"
  data_labels = (0..1).map{|i|  "N*f0*,000000,#{i},-1,11"}.join("|")

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class User
  setName: (name) ->
    @name = name

class Programmer

user = new User
programmer = new Programmer

user.setName.apply programmer, ['Oscar']

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while read rev; do
  git diff $rev |
  grep foo;                                                                                                                                                                     
done

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<form class="my_form">
  <a class="my_link"></a>
</form>

<script type="text/javascript">
$('.my_form').live('ajax:success',
  // this gets triggered when I click on my_link, I don't want that
)

$('.my_link').live('ajax:success',

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class Foo
  def speak
    'hello'
  end
end

my_proc = Proc.new do |event, file, line, id, binding, classname|
  printf "%8s %s:%-2d %10s %8s\n", event, file, line, id, classname
  while cmd = gets.chomp do
    if cmd == 'n'