Jasper's blog on whatever takes his fancy
I am Jasper Sprengers, all-round software developer on the JVM (Java, Scala, Kotlin), currently with Ilionx working at ASML as Scrum Master and developer. On this blog I write about anything that fascinates me about the craft of building software, among other topics that tickly my fancy. I don’t do social media, but you can find me at LinkedIn.

Latest stories

De gedoemde Corona App


De rijksoverheid geeft de aftrap om in sneltreinvaart een grootschalig uit te rollen softwareproduct te laten ontwikkelen om de nu al ontwrichtende coronapandemie in te dammen. Alle goede argumenten dat dit nooit kan werken zullen niet gaan helpen. De grote uurtje-factuurtje partijen van IT-land krijgen een blanco cheque voor een bij voorbaat gedoemd project.

De technocratische straigh-to-code mentaliteit die ik maar al te vaak ervaar in mijn dagelijkse werk wordt hier weer eens pijnlijk duidelijk. Eerst duidelijk omschrijven welke behoefte we met de software willen vervullen en testbare acceptatiecriteria formuleren is geen hinderlijke onderbreking van het eigenlijke programmeerwerk. Het maakt het verschil tussen doing the right thing en doing things right.

Just another reason to avoid hibernate – revisited


My previous love affair with Scala has cooled a little since I discovered Kotlin, which is my language of choice for new projects. However, I did produce a light-weight Scala library at the time to make JDBC queries easy and transparent, with a gentle learning curve and a minimum of boilerplate. Recently I brushed up a little and upgraded the dependencies. You can find it on my gitlab. (more…)

The future won’t be anything like 1984: it could be even worse


In George Orwell’s Nineteen Eighy-Four, English Socialism (Ingsoc) has created the mother of all police states and turned proud England into a wretched wasteland. Suppression and retribution are as brutal as the neglect of people’s well-being is callous. Everyone is a slave but for a tiny elite of Inner Party members. The Party exists only to grow more powerful and its sole purpose and expression of this power is to make people suffer. It is personified by Big Brother, whose image stares you in the face at every street corner. Yet he never appears in public and we can’t be certain he even exists. Everywhere you are watched. Every passer-by, every co-worker could be an agent of the Thought Police. Rumour has it they can read the tiniest involuntary twitches in your face that could betray anti-revolutionist thoughts, as if they can look right inside your brain. Fear is constant and daily life an exhausting struggle to toe the line.

John Hurt as Winston Smith and Richard Burton as O’Brien in Michael Radford’s adaptation (1984)


Programmeren met passie? Please!


Peter de Wits laatste Sigmund column kwam als geroepen deze zaterdag. Ik liep al langer met het idee om eens af te rekenen met het grootste jeukwoord van de afgelopen jaren. Ik hoop dat de Volkskrant deze trouwe abonnee en Sigmund fan dit fair use toestaat…

Peter de Wit in de Volkskrant van 4 aug 2018


ATDD testing: All Tests Drive Development


I have always been a fan of testing and blogged about it in the past. Software testing is a complex discipline. Most developers admit it’s important, but I think we are often mistaken about the true purpose of testing. It already starts with the word ‘test’, which has a wider range of meanings in software than the dictionary definition [to] take measures to check the quality, performance, or reliability of (something), especially before putting it into widespread use or practice. What is this something? The software of course! Ah, so we apply the test to something that’s already there. We test to check the work we have done. That not quite TDD. (more…)

Jasper's blog on whatever takes his fancy

Recent Posts

Jasper on twitter

Catching thought criminals in Orwell's analogue dictatorship was time-consuming and ineffective. A.I. will fix all… https://t.co/XpzIDondJe
h J R
I expect Mars to be successfully colonized long before we have flawless PDF to Word conversion.
h J R
Don’t tout #kotlin conciseness as a unique selling point. Concise does not equate understandable and if concise is… https://t.co/Hj7FrbZuI8
h J R
Hilfiger gives ‘smart dress’ a whole new meaning with new tracking chip. https://t.co/OeB4NEbVQI
h J R
ATDD is really different. Think of it as All Tests Drive Development. New blog post. https://t.co/J7uyHmCXFf
h J R