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Express Middleware & Memoization

Express middleware Middleware functions are functions that have access to the request object (req ), the response object (res ), and the next function in…

Code Refactoring & Decompose Conditional Technique

Code refactoring Refactoring is the process of changing a software system in such a way that it does not alter the behavior of the code…

Migrating push notifications from Urban Airship to Amazon SNS

The project we are working on is web application implemented in Ruby on Rails with API used by mobile clients - iOS and Android and…

Migrating push notifications from Parse to Amazon SNS

We recently switched from Parse to Amazon SNS for our push notification service. Parse is shutting down on January 28th, so we had to switch…

Using Puppet to build Docker images

One of Docker's most enticing features is rapid application deployment, meaning that once we generate a Docker image, it contains the application itself and all…