Julien's DevRel corner

kotlin

Advent of Code Day 2 : Kotlin TIL - regex destructuring

How I solved Advent of Code day 2, live, and what I learned from it.

kotlin

Advent of Code Day 1 : Kotlin TIL

How I solved Advent of Code day 1, live, and what I learned from it.

development

Advent of Code in Kotlin : Learnings day by day.

The thread of all my solutions, day after day on how I solved Advent of Code puzzles in Kotlin! Every day I record myself, and then revisit and improve my solution to learn from them.

cloud

Thoughts on using Docker in the cloud for side projects

Why are cloud provider barebones Docker container solutions so expensive to run? This makes them virtually unsuitable for side projects.

java

Paginate results in a command line application using picoCLI

In this article, I describe a way to paginate results in picocli applications.

raspberry

Building a wine cellar monitoring system - Part 2 : Creating a native Java library

In this article, we will to create a native library so that our C driver can be used from Java. We will also create a jar that includes the library. We generate our outputs using Github Actions with the help of cross-compilation and even publish our jars there as packages!

iot

Building a wine cellar monitoring system - Part 1 : The hardware and setup

In this series of posts, we'll see how to build a wine cellar monitoring system sending data to the #cloud with some #iot, #timeseries and #microservices on a #raspberrypi. Is that enough buzzwords yet?

docker

Reducing our Carbon Docker image size further!

Second post of the series, we keep diving into more ways to reduce our Docker image size. Let's see how we manage to reach a factor 10!

docker

Reducing Docker's image size while creating an offline version of Carbon.now.sh

Creating a docker image of carbon.now.sh that is as small as possible, step by step so we can create beautiful snippets offline.

java

Jpackage : Overview of one of Java 14's hidden gems

Jpackage : Overview of one of Java 14's hidden gems. In this article we will create an installer for Minecraft using jpackage.

kotlin

Some fun with Kotlin, Exposed and MySQL

Some lessons learned from playing around with Kotlin, Exposed, SQL and the iMDB datasets.

google

My dialog flow and PSD2 talk at @JFuture

This post lists the recording and resources of my IOT Talk at JFuture.

conference

Introvert? Try speaking at a conference!

This post reflects on my experience as an (introvert) conference speaker for the first time earlier this year. I got the chance to speak at JFuture in October. I really loved the experience and some of the things I learnt there really surprised me

kotlin

Introducing Kotlin at ING, a long but rewarding story

This article describes our journey being the first team to run Kotlin in the backend at ING (Netherlands). Hopefully this article will give you some keys on how to introduce it as well in your own large company, and reduce some of the friction you might encounter.

elm

About integrating Firebase in your Elm project

This article introduces an example project on how to integrate Firebase and Elm together

elm

A short introduction to Ports and Flags in Elm

A simple demonstration on how to work with Elm Flags and Ports, with interactive code

meetup

Creating communities : Consistency is paramount

As part of my job as IT Chapter Lead at ING, I am responsible for the 'mastery' of my chapter members. What that means is that I need to make sure they are basically on top of their game, and keep growing (in the direction they want!). I do most

gitlab

Gitlab Time in Lane : a chrome extension

I built a simple chrome extension to know how long gitlab issues have been sitting in the same lane.

personal

Upgrading from Jekyll to Ghost

I have already explained in my last post [https://lengrand.fr/goodbye-github-pages-welcome-ghost/] the reasons for moving away from Jekyll [https://jekyllrb.com/] running Github Pages [https://pages.github.com/]. This post describes the steps I took to move everything over to Ghost [https://docs.ghost.org/setup/], focusing on the

personal

Goodbye Github pages, welcome Ghost!

The last days, I finally set myself to something that was long overdue! After years using Jekyll [https://jekyllrb.com/] hosted on Github Pages [https://pages.github.com/], I decided to move away from it and am now using Ghost [https://ghost.org/] on a Digital Ocean droplet. I originally

management

Open Offices are evil, Long live Open Offices!

Open Office plans are supposed to help collaboration. But really, they're a disaster and most people hate them.

development

Installing gdal for Python 3.6

Heyo, At Skyai [http://skyai.io/], we are working a lot with Geographic Information Systems [https://en.wikipedia.org/wiki/Geographic_information_system]. Just like the large majority of the market, we use GDAL [http://www.gdal.org/] and its Python bindings for that. Even though we are ESRI partners,

development

Creating a wall dashboard with an old laptop screen

Heyo, The past year, I've had a growing need for a dashboard to check what's coming. Lots of things to take care of for the baby, my girlfriend leaving couple days a month on average, keeping all family visits in mind, but also checking the weather of the day to

hack

Automating the activation / deactivation of Spotify's proxy settings

I'm a BIG fan of Spotify [https://www.spotify.com/]. I use it every day, hours on end. I like the fat client though, I find the web version way too buggy and unstable. At ING, we use a HTTP proxy and I have configured Spotify to go through the

maps

Playing around with Google Maps and Puppeteer to track parking lots

Over the last weeks, I have been reading quite a bit about Geomarketing [https://en.wikipedia.org/wiki/Geomarketing] and have been searching for fun experiements to do. One of my ideas was to check how many of the largest Carrefours [https://www.carrefour.fr/] in France has open parking