stefanosc

### Keybase proof

I hereby claim:

  * I am stefanosc on github.
  * I am stefanosc (https://keybase.io/stefanosc) on keybase.
  * I have a public key ASB-DApLRrUNvOaDs4Qs-th7ZUxsfPYfAQePDlEtM58pFwo

To claim this, I am signing this object:

stefanosc

class Email < ActiveRecord::Base

  # Nope, it's not RFC compliant. F*** that regex.
  # http://www.ex-parrot.com/~pdw/Mail-RFC822-Address.html
  EmailRegex = /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i.freeze

  before_validation :strip_spaces

  # Public: The email address.
  # column :address

stefanosc

#!/bin/bash
# sidekiq    Init script for Sidekiq
# chkconfig: 345 100 75
#
# Description: Starts and Stops Sidekiq background worker.
#
# User-specified exit parameters used in this script:
#
# Exit Code 5 - Incorrect User ID
# Exit Code 6 - Directory not found

stefanosc

#!/bin/sh
#
# redis - this script starts and stops the redis-server daemon
#
# chkconfig:   - 85 15 
# description:  Redis is a persistent key-value database
# processname: redis-server
# config:      /etc/redis/redis.conf
# config:      /etc/sysconfig/redis
# pidfile:     /var/run/redis.pid

stefanosc

Answers:

1. Because data sets can be related through the use of foreign keys
2. Structrured Query Language, it is a stnadard language to query database to retrieve / store data
3. Schema aka Strucre view which shows the list of the column names, data view whcih shows the actual data (rows of data)
4. The Primary key, which is usually the id
5. The forgeing key is used in rows in a table to join other rows from another table, where the foreign key is the primary key
6. About ActiveRecord pattern we can say that each table is represented by a Class and each row (of that table) by an instance of that Class. The Class usually also provides attr accessor methods to retrieve / store data in each column
7. crazy_monkeys - we can also use the very useful 'CrazyMonkey'.tableize method which returns => "crazy_monkeys"
8. Assuming the following:

stefanosc

I don’t understand how to use the generated methods as described in the various M:M associations: others
others=(other,other,...)
other_ids
other_ids=(id,id,...)

In the HMT association like in our post-it app project I need to first create the post and then in a second line of code assign it the category / categories. It would not be possible to assign categories in the same line / query where the object is created. Is this correct?

What is the :autosave option on a has_one, belongs_to, has_many, or has_and_belongs_to_many association

stefanosc

# Sinatra environment

# Make sure that the link to the "bootstrap.min.js" file is correct in your layout.erb (shown below):
<script src="/vendor/bootstrap/js/bootstrap.min.js"></script>

# Put this in your .erb
<%= show_env %>

# Place constant inside of your main.rb
SHOW_ENVIRONMENT = true

stefanosc

What is HTML? What is CSS? What is Javascript?

HTML is a markup language, used to create HTML pages. CSS stands for cascading style sheet and is a language developed to apply styling properties to HTML documents. Javascript is a so called client side programming language that allows to manipulate a webpage after it has already been rendered in the client browser

What are the major parts of an HTTP request?

request line request headers (optional) blank line request message (optional, may contain POST data)

stefanosc

//Cool little js function to get version of IE if browser is IE 

var ie = (function(){

    var undef,
        v = 3,
        div = document.createElement('div'),
        all = div.getElementsByTagName('i');

    while (

stefanosc

SELECT e.album_id

  FROM jos_hwdms_media as m

  LEFT JOIN jos_hwdms_album_map e 
  ON m.id = e.media_id

  LEFT JOIN jos_hwdms_category_map as h 
  ON m.id = h.element_id