Ruby On Rails

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Working with Facebook using Devise, Omniauth, Koala and Rails 5

Working with Facebook using Devise, Omniauth, Koala and Rails 5 First of all, we need to setup our Facebook app. There’s not much to add on this, simply create a new Facebook app if needed. When your app is created, make sure to add the proper app domain. In this case, the app domain will be localhost to allow...

Tips for Using FactoryGirl Without an ORM

Tips for Using FactoryGirl Without an ORM FactoryGirl is one of my favourite testing tools — I was a fan prior to joining thoughtbot. It’s one of those tools I miss immediately when working outside the Ruby ecosystem.Recently I’ve been working on a Rails project that doesn’t need any data...

How to write a lock free Queue

How to write a lock free Queue Update: I did mention that lock free data structures are really hard to write, it looks like there might be some issues that haven’t been addressed in the implementation of this LF Queue that we’re referencing. The rest of the analysis is still va...

RailsCasts Pro episodes are now free!

RailsCasts Pro episodes are now free! RailsCasts Pro episodes are now free!June 27, 2017It has been four years since I last produced a RailsCasts episode, and I feel it is time to release all paid content for free. Anyone can now watch all Pro and Revised episodes!Thank you very much ...

Adding Read Replicas in a Production Ruby on Rails System with Zero Downtime Using Makara

Adding Read Replicas in a Production Ruby on Rails System with Zero Downtime Using Makara When query, schema and index optimizations aren’t enough to support the load of a high throughput database system, fundamental changes in how data flows through that system are often necessary.Over the past few years, our team at Contactually has ...

Launch School - Demystifying Rails

Launch School - Demystifying Rails This book doesn't teach how to use Rails to build prototypes. Instead, this book dives one layer below the surface to expose how Rails is pieced together. We'll take common Rails conventions apart and study each component from the perspective of w...

Implementing Linear Regression using Ruby - Practical Artificial Intelligence

Implementing Linear Regression using Ruby - Practical Artificial Intelligence In this posts I will show how to implement linear regression in Ruby. Using existing Ruby gems we will setup a linear regression model, train the algorithm and make predictions in minutes. For this example we will use historic house prices in Stat...

Devise Facebook Omniauth login with connect and disconnect functionality

Devise Facebook Omniauth login with connect and disconnect functionality When talking about users authentication in Rails land there is one name that generally stands above all the other available gems. This name is Devise.I would not be so wrong to call it the de facto standard of Rails authentication considering the ...

Design Patterns

Design Patterns I wanted to take some time to write about a subject that, in my view, we in ruby land have an easy time ignoring: design patterns. Ruby’s expressiveness and readability make it easy to forget that the maintainability of code largely depends on its...

The Art of Defensive Programming | JavaScript Bosnia

The Art of Defensive Programming | JavaScript Bosnia The European Space Agency’s Ariane 5 Flight 501 was destroyed 40 seconds after takeoff (June 4, 1996). The US$1 billion prototype rocket self-destructed due to a bug in the on-board guidance software. A bug in the code controlling the Therac-25 ra...