caike

class Topic < ActiveRecord::Base
  
  before_create :set_start_trending
  before_save :check_content
  before_save :set_hot_topic, :if => Proc.new { |topic| topic.mentions >= HOT_TOPIC_MENTIONS }


  scope :trending_top, lambda { |num| where("started_trending > ?", 1.day.ago).order('mentions desc').limit(num) }

  HOT_TOPIC_MENTIONS = 1000

caike

class ContentModerator

  def self.is_suitable?(content)
    # checks against a web service
    # or local dictionary
  end

end

caike

class TweetsController < ApplicationController

  def index
   
    # @tweets = Tweet.all
    
    # Tweet Load (0.4ms)  SELECT `tweets`.* FROM `tweets` ORDER BY created_at desc
    #  User Load (0.4ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 1) LIMIT 1
    #  User Load (0.4ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 2) LIMIT 1
    #  User Load (0.3ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 3) LIMIT 1

caike

# in the user form partial

<h3>Preferences</h3>

  <% User::PREFERENCES.each do |preference| %>
    <div class="field">
      <%= check_box_tag "user[preferences[#{preference.to_s}]]", "1", @user.preferences ? @user.preferences[preference] : false %>
      <%= label_tag :attribute, preference.to_s.titleize %>
    </div>
  <% end %>

caike

class User < ActiveRecord::Base

  has_many :tweets
  has_one :account_setting, :dependent => :destroy
  accepts_nested_attributes_for :account_setting

  validates_presence_of :first_name, :last_name, :email
  validates_uniqueness_of :email
  validates_presence_of :age
  validates_exclusion_of :age, :in => 0..18, :message => 'underage'

caike

desc 'Long running task involving all tweets'
task :long_running_task => :environment do

  ActiveRecord::Base.logger = Logger.new STDOUT

  # defaults to 1000
  Tweet.find_each() do |tweet|
    p "long running task for #{tweet}"
  end

caike

class TopicsController < ApplicationController
  
  def index
    @topics = Topic.select([:id, :name]).order('mentions desc')
    #@topics = Topic.order('mentions desc')
  end
  
  def show
    @topic = Topic.find(params[:id])
  end

caike

<% @tweets.each do |tweet| %>
  <tr>
    <td><%= tweet.status %></td>
    <!--<td><%#= tweet.user.display_name %></td>-->
    <td>
      <em>
      <%#= (tweet.user.account_setting && tweet.user.account_setting.location_on_tweets?) ? 'available' : 'unavailable'%>
      <%= tweet.has_location_data? ? 'available' : 'unavailable' %>
      </em>
    </td>

caike

before = Time.now.to_i
sleep 5
now = Time.now.to_i

p "#{now - before} seconds have passed"

caike

function Machine(){

  this.totalAmount = 0;
  this.items = {'twix': 0, 'coke': 0, 'tostitos': 0};

  this.insertMoney = function(amount){
    this.totalAmount += amount;
  }

  this.total = function(){