Tag "Design Patterns"

Understanding the Strategy Pattern

A colleague of mine is currently trying to study and learn Design Patterns. For the uninitiated, the term Design Pattern often refers to a set of well-known patterns used to solve problems that often present themselves in software. The primary work was originally written by Gamma et. al in Design Patterns: Elements of Reusable Object-Oriented Software. My colleague was reading an article on the internet on the Strategy Pattern, and voiced frustration at how contrived the examples were in the article, and how this seems to be a recurring pattern (no pun intended) when we create content around Design Patterns for one another.

This post is my attempt to clarify information about the Strategy Pattern for my colleague, and my hope is that this effort will benefit a large audience of developers experiencing the same frustrations. Let’s get started.

RxJS' fromEventPattern API

The Observable API is extraordinarily useful for asynchronous programming. It enables us to decouple data sources from data processing targets, create sophisticated processing pipelines, and create deterministic sequences. In RxJS, there are also a number of functions for creating Observable instances. This post will give you a brief overview of the history of the Reactive Extensions (RX), as well as an introduction to one of my favorite RX operators, fromEventPattern.