Perl and Scala: what can they learn from each other?

Ironically Scala at first drew my interest, because I discovered that about ten years ago there was no really good understanding of how to do a good multithreading concept for Perl 6. I thought exploring how they do it in Scala, where it was already known to be good at that time, would give a […]

Share Button

Phone Numbers and E-Mail Addresses

Most data that we deal with are strings or numbers or booleans and combinations of these into classes and collections. Dates can be expressed as string or number, but have enough specific logic to be seen as a fourth group of data. All these have interesting aspects, some of which have been discussed in this […]

Share Button

Ranges of Dates and Times

In Software we often deal with ranges of dates and times. Let us look at it from the perspective of an end user. When we say something like „from 2020-03-07 to 2019-03-10“ we mean the set of all timestamps such that     or more accurately:     Important is, that we mean to include […]

Share Button

Functional Scala London 2019

In December 2019 I attended the conference Functional Scala in London which was initiated and managed by John de Goes. See Skillsmatter about what happened to Scala Exchange. Of course a large part of the conference was related to ZIO, which seems to be a part of the eco system surrounding Scala with a lot […]

Share Button

Visit to reClojure in London 2019

On 2019-12-02 I visited the conference reClojure. This was an admirable community effort to create a replacement for ScalaExchange, which simply did not happen because of the bankruptcy of Skillsmatter. There was only one track, so the schedule is exactly what I visited. I will just copy it below, because schedules from conference sites usually […]

Share Button

How to get rid of these HTML-entities in Files

It has been written here that HTML-entities (these ä etc) should be avoided with the exception of those that we need due to the HTML-syntax like <, >, & and maybe " and  . They were already mostly obsolete more than 20 years ago, but in those days we still did not automatically use UTF-8 […]

Share Button

Devoxx UA and Devoxx BE 2019

In 2019 I visited Devoxx UA in Kiev and Devoxx BE in Antwerp. Traveling was actually a little story by itself, so for now we can just assume that I magically was at the locations of DevoxxUA and DevoxxBE. In Kiew I attended the following talks: Probabilistic data structures in nutshell (in Ukrainian) [Oleksandra Kulyk] […]

Share Button

Travelling to Devoxx UA and Devoxx BE 2019

Travelling to this years Devoxx conferences is worth its own short article, even though it is not very IT oriented material… On the last weekend in October I brought a bicycle to a place near Frankfurt, let’s call it FrankfurtE. I took the train to Karlruhe and then back from FrankfurtE, but cycled from Karlsruhe […]

Share Button

Company „Skillsmatter“ stops operations

The company Skillsmatter in London has been put „under administration“ and basically stopped its operations. The web site seems to suggest, that everything is still ok, but that is not the case and I have heard so from several sources. The owner Wendy Devolder writes on Twitter and on Linkedin. Or here are some more […]

Share Button

Checked Exceptions in Java

In Java it is possible to declare a method with a „throws“-clause. For certain exceptions, that are not extending „RuntimeException“ or „Error“, this is actually required. What looked like a good idea 25 years ago has proven to be a dead end. I do not know of any other major programming language that opts for […]

Share Button