5d0be7db35e8c5d24a0b63f4de463430

How to build a web framework with Ruby

Time & Place: 20.12.2012, 7pm - 9pm at Hacklab KIKA

We will present how to build a web framework wtih Ruby and walk through the source code of kreator. Kreator is a small MVC web framework build to demonstrate the basic concepts of Ruby on Rails, and generally any MVC web framework from the bottom-up perspective.

We'll start with a simple Rack (Ruby Webserver Interface) application. Then we will continue by introducing the basic concepts of web applications such as router, cookies and input params. We'll see what are Rakefile and Gemfile and how to test applications written with this library. In the end we'll write SQLite model adapter, see how templates rendering works and end up with full MVC architecture.

5d0be7db35e8c5d24a0b63f4de463430

Backbone.js on Rails

Time & Place: 6.12.2012, 7pm - 9pm at Hacklab KIKA

In this presentation Peco Danajlovski will introduce you to Backbone.js and how to use it with Ruby on Rails web framework to build complex user interfaces.

Backbone.js is a light Javascript library based on MFC architecture that will help you stop writing javascript spaghetti. It was originally extracted from a Rails application (Document Cloud), which means it's easy to integrate it with Rails.

Peco will also explain how to create JSON APIs in Rails and connect client-side (Backbone) Models to sync with them. He'll use CoffeeScript to write Javascript. And, he'll also talk about RABL (Ruby API Builder Language), a templating system for generating JSON, XML and other data formats.

5d0be7db35e8c5d24a0b63f4de463430

Refactoring ActiveRecord models

Time & Place: 22.11.2012, 7pm - 9pm at Hacklab KIKA

In this presentation Dalibor Nasevic will talk about common anti-patterns in ActiveRecord models and different ways to refactor them. We'll see how to improve the quality of a Rails application by applying basic principles of Object Oriented design like Decoupling, The Law of Demeter, Single responsibility principle, etc.

We'll also learn how to avoid fat ActiveRecord models, when to use model callbacks and why nested model attributes are not as good idea as advertised. 

5d0be7db35e8c5d24a0b63f4de463430

Machine Learning in Ruby

Time & Place: 01.12.2011, 7pm - 9pm at Hacklab 2.0

Meeting agenda: Machine Learning in Ruby

In this presentation Dalibor Nasevic will introduce you to the basic concepts of machine learning. We will look at a prototype implementation of a news aggregator (code can be seen here) that consist of the following components:

  • training data set
  • collection data from several news media
  • parsing of RSS / HTML texts
  • statistical classification method
  • creating a cluster with statistical method

We will also look at the different tools used in the implementation of the prototype:

  • Programming Language: Ruby 1.9.2
  • Standard libraries: open-uri, net / http, rss (rss/2.0), json
  • Other Ruby libraries: Sintara, Redis, Haml, Sass, Nokogiri
  • Database: Redis

Purpose of the presentation:

  • news aggregator as a concept and realization
  • brief introduction to the tools used with emphasis on Redis and in what scenarios it can be used
  • discussion of other algorithms for classification and clusterification of texts (Bayes, Latent Semantic Analysis, K-means
  • discussion of the architecture for larger applications of this type (couchdb / mongodb, parsing and analyzing texts in Macedonian language)
  • reviewing ideas for applications of this kind in Macedonia

Истава новост на македонски јазик можете да ја прочитате овде.