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Damian Perera

Using a Programmatic Representation of Graphs

I came across this question on StackOverflow listed under Dynamic Programming, but there didn’t seem to be an accepted solution with an explanation — so I figured I’d give it a shot and document the solution along-with my thought process.

Enjoy!

The Problem

There is a character who can move around on a two-dimensional (x,y) coordinate grid. The character is placed at point (0,0).

From (x, y) the character can move to (x+1, y), (x-1, y), (x, y+1), and (x, y-1).

Some points are dangerous and contain land mines. To know which points are safe, we check whether the sum of the…


A look into reducing bug leakages in microservices shared across multiple development teams

I work in a software organization where change is frequent, to say the least. As a developer and part of a larger team building an e-commerce platform, we’ve more or less adapted to frequent changes in project management, development methodologies, testing ideologies and of course now (given the current global pandemic), remote collaboration. …


This article was originally published on my personal blog in November 2016 and is recommended for developers looking to begin development for the HoloLens 1 Developer Edition — in no way does this cover the entire spectrum of game physics, programming paradigms, and concepts that a developer needs to know when building advanced applications for the HoloLens or any other Mixed Reality device.

In order to understand the concept of Mixed Reality, one must first be familiar with the terms of Virtual Reality and Augmented Reality, for Mixed Reality is a culmination of both the Virtual and Augmented scopes.

  • Virtual…

Learn how Docker is transforming the way we code

Image by itl.cat via Google Images

Ever since Docker went live in early 2013 it’s had a love-hate relationship with programmers and sysadmins. While some ‘experienced’ developers that I’ve talked to have a strong dislike for containerization in general (more on that later), there’s a reason why a lot of major companies including eBay, Twitter, Spotify and Lyft have reportedly adopted Docker in their production environments.

So what exactly does Docker do?

Ever worked with VMware, VirtualBox, Parallels or any other virtualization software? …


Learn how and why you need to switch to ECS Scheduled Tasks when running periodically scheduled services

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ECS allows you to deploy and run containers on a fully-managed orchestration service (similar to Kubernetes). While the most common use case of ECS (as far as I know) is to continuously run services on containers, there could be some architectural designs that require some services to only run periodically.

One way to achieve this would be to add a cron job to the Dockerfile of the container in order to start the service periodically (while running the cron daemon in the foreground). …

Damian Perera

Full Stack Developer // damian.perera.io

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