zerothabhishek

# To produce a database.yml file for production environment,
# while installing with Capistrano, and using 
# database initialization recipe from here -  http://gist.github.com/2769

# for rails3-mysql

production:
  adapter: mysql2
  database: <%= "#{application}_production" %>

zerothabhishek

##
# How to run:
#   ruby scrape.alexa.rb
#
# Output:
#   20 files each with the data in csv format
#
# Dependencies:
#   ruby version > 1.9  # "ruby -v" to check
#   nokogiri gem        # "gem install nokogiri" to install

zerothabhishek

SPREE

Intro

e-commerce software
open-source
rails/ruby based
For programmers

zerothabhishek

## open class

    class Array
      def second_last
        self[-2]
      end
    end

    class Array
      def first

zerothabhishek

## Program Nov-1

Sessions:
- TryRuby
- Before Rails
~~ Lunch
- Sinatra
- Rails-1
~~ Tea Break

zerothabhishek

def foo(x)
  case x
    when 10                  then 'The number Ten'
    when String              then 'A String'
    when lambda{|x| x%2==1 } then 'An odd number'
    when (1..9)              then 'In range'
  end
end

zerothabhishek

Confreaks:
http://confreaks.tv/videos/larubyconf2013-refactoring-fat-models-with-patterns
http://confreaks.tv/videos/railsconf2015-nothing-is-something
http://confreaks.tv/videos/railsconf2012-ten-things-you-didn-t-know-rails-could-do
http://confreaks.tv/videos/burlingtonruby2014-breaking-up-with-the-asset-pipeline
http://confreaks.tv/videos/railsconf2015-docker-isn-t-just-for-deployment
http://confreaks.tv/videos/rubyconf2014-enumerable-for-fun-profit
http://confreaks.tv/videos/rubymanor3-programming-with-nothing

zerothabhishek

SELECT posts.*, comments.*
FROM posts LEFT JOIN comments
ON posts.id = comments.post_id;

zerothabhishek

EXPLAIN
  SELECT posts.*, comments.*
   FROM posts LEFT JOIN comments
   ON posts.id = comments.post_id;

# Before adding indexes

                               QUERY PLAN
------------------------------------------------------------------------
 Hash Right Join  (cost=394.50..2589.00 rows=50000 width=150)

zerothabhishek

The November 2015 meetup was held at the Postmark office on 21st. Here are some pictures.

The meet-up began with an introductory talk about the host company by Mithin. After that we went into the first talk, Speed up Mongo, by Gaurav Shah. The talk was about various lessons learned about Mongo performance in production. The talk also spawned many minor discussions via which we went into some other nitty-gritties of Mongo-Db. The slides are worth a look if you are planning to use Mongo for a project, and are curious about scaling.

The second talk was on Fraud Detection and Prevention in Ecommerce by Ketan Jain. This talk was about the many techniques that Postmark and similar companies apply to check fraud. An interesting and relatable talk, as many scenarios discussed are applicable in In