geekmonkey

Elixir

How to update multiple records with different values in Ecto.Repo.update_all

I recently ran into a problem where I wanted to update many database records with a single update_all/2. In this particular case, I was dealing with a table that leveraged parent_id to model a basic parent-child hierarchy. id parent_id name 1 NULL root 2 1 child

Elixir

Detecting unused database columns using Ecto schemas

When building large database-backed Elixir applications using Ecto, it is inevitable for your database schema to evolve over time. As your database schema changes, it's possible for there to be discrepancies between the tables in the database and your local schema definitions. Tracking inconsistencies between the schema defined

Names should be descriptive, not cute

‘There are only two hard things in Computer Science: cache invalidation and naming things.’ - Phil Karlton Mixmaster, Broadside, Windcharger, Ransack, Ramjet, Wheeljack, Skyfire, Slingshot and Wideload. Those were project names I had to deal with in my previous role. Some of those projects were backend services, some libraries and

Python

Setting up PyTorch on Mac M1 GPUs (Apple Metal / MPS)

I'm currently taking the Deep Learning nano degree offered by Udacity to deepen my knowledge of modern Machine Learning and Deep Learning. The course walks through the basics of ML and introduces PyTorch and will require knowledge of it in later stages. This post will be short and

Git

Rethink your git workflow with git-worktree

Git is a powerful tool used by almost everyone in the the tech industry. Worktrees are an often overlooked feature that is presented in this article.

Keyboards

Learning to type Dvorak

Earlier this year, and for the first time in my professional life, I experienced pain caused by repetitive stress injury (RSI). An incorrect desk setup or keyboard can have many detrimental effects on your ability to sustain long hours in front of a computer. With RSI not wanting to go

Advent Of Code

It's bingo time (AoC 2021 Day 4)

Our underwater journey continues. It can get dark underwater, and today is no exception. The only thing we can see apparently is a giant squid that has attached itself to the outside of our submarine. It's only logical that we decide to play Bingo with the squid. Hey,

Advent Of Code

Advent of Code 2021 - Day 3

Deep under the water, we find ourselves hearing creaking noises. Our submarine handily gives us a diagnostics report. Sadly, as is oft too common in AoC, the report format is complete garbage, to put it mildly. Our puzzle input comes in the form of binary numbers. The task is to

Advent Of Code

Advent of Code 2021 - Day 2

The advent of code is an annual coding challenge in the month of December. This article covers the second day's puzzle with a solution written in Go.

Advent Of Code

Advent of Code 2021 - Day 1

The advent of code is an annual coding challenge in the month of December. This article covers the first day's puzzle with a solution written in Go.

Learn With Me: Julia

Learn With Me: Julia - Bitwise Operators (#4)

This articles covers bitwise operators in Julia and uses them to implement a CRC32 algorithm to validate PNG data chunks.

Learn With Me: Julia

Learn With Me: Julia - Structs and Binary I/O (#3)

Diagrams.net (formerly draw.io) is a fantastic website and tool that allows you to create rich diagrams. The service is entirely free and diagrams can be saved to your Google Drive, Dropbox, or downloaded to your computer. Additionally, diagrams.net allows you to export your diagrams to various formats

Learn With Me: Julia

Learn With Me: Julia - Tools and Learning Resources (#2)

A short collection of tools and resources that help experienced developers learn Julia.

Learn With Me: Julia

Learn With Me: Julia - Introduction (#1)

Welcome to Learn With Me: Julia. A series where you can follow me along my journey of learning Julia, Data Science and Machine Learning. This series is heavily inspired by Learn With Me: Elixir [https://inquisitivedeveloper.com/lwm-elixir-1/], a series by Kevin Peter / The Inquisitive Developer and the format of

Julia

Julia GPU Programming with WSL2

A walkthrough on how to get started with Julia GPU programming under WSL2 on Windows.

Developer PC Build 2021

What components are required to build a good developer machine in 2021? In this article I summarize how I built my most recent machine and how I selected its components.

Julia

Getting Started with Julia Lang

During my early studies and later in my career I had the opportunity to hone my engineering skills in a variety of different programming languages. I started in my early teenage years with QBasic and then progressed on to more advanced languages. In open source projects I've largely

100 Days Of Code

#100DaysOfCode: Julia Edition

If you've been on Twitter recently and have followed someone in tech, chances are you have encountered #100DaysOfCode mentioned at least once. I'm taking him up on the challenge and I'll be coding 100 days in Julia starting April 12th, 2021. Backstory 100 Days

Python

Regular expression matching at scale with Hyperscan

Regular expressions are and always have been ubiquitous in Software Engineering. From input matching to complex parsing, their use is wide-spread. There are many different regular expression engines out there. The most popular by far is PCRE [https://www.pcre.org/], or Perl Compatible Regular Expressions. Go developers will be

PostgreSQL

Optimizing PostgreSQL queries using pg_stat_statements

Postgres comes with a number of really powerful tools to help analyze query and overall database performance. Here's how I usually go about finding and improving query performance.

Ruby on Rails

Deploying your Rails 5 apps to Dokku - Part 1

In this tutorial we will be using a DigitalOcean Droplet to install and run dokku and deploy a Rails app to it. After reading this tutorial, you will be able to: * Set up a DigitalOcean droplet using dokku * Install a dokku plugin to run your database * Deploy a Rails app

Using layouts with jade in express.js

Recently I've been working on a side project[^1] of mine and decided to make use of the jade template engine[^2]. Jade provides nice syntax abstraction over HTML and is the default template engine for express.js[1]. Previous versions of jade/express allowed for automatically loading

Java

Migrating from Maven to Gradle

Java has a long history of using XML configurations for everything. If you are like me, you do not enjoy writing or editing XML files as they are almost never human readable. Adding plugins to your Maven pom.xml usually means copying an XML snippet from a page and manually

Matomo

Automatically create Annotations for your Feeds in Piwik

Piwik 1.10 introduced annotations that you can add to all of your graphs. Annotations can help you in understanding your traffic and mark relevant dates that can explain traffic peaks. Piwik's simple plugin API allows developers to build and add new features easily to Piwik. FeedAnnotation New

Matomo

Annotations and Page Overlay in Piwik 1.10

Piwik 1.10 is about to be released and it is time to take a look at the new major features coming with it. Version 1.9 was released in October 2012, with the latest patch 1.9.2 on November 27th. Since then the developers have implemented incredible new