The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Power User’ Category

Is Fortran better than Python for teaching the basics of numerical linear algebra? – Dr. Jean-Christophe Loiseau

Posted by jpluimers on 2026/01/13

The summary of [Wayback/Archive] Is Fortran better than Python for teaching the basics of numerical linear algebra? – Dr. Jean-Christophe Loiseau is:

  1. 1-based indexing prevents off-by-1 errors
  2. structure is key, especially these foundations:
    • clear begin/end constructs instead of visual clues
    • strong typing
  3. verbose programming languages are easier to learn than non-verbose ones

Modern Fortran helps a lot here and shows that after the initial 13 year gaps between FORTRAN 77 and Fortran 90, and between Fortran 90 and Fortran 2003 (the ANSI Standard Fortran and Fortran 95 in between versions were just minor updates), Modern Fortran has come a very long way and now as a thriving community and an extensive list of Fortran software and tools.

Other typed languages and tool sets like C# and Delphi come to mind here as well though you need libraries with 1-based data structures to solve the first point.

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Posted in Development, Fortran, Learning/Teaching, LifeHacker, Power User, Python, Scripting, Software Development | Leave a Comment »

Does Odido (the old T-Mobile Netherlands) which took over Tweak Internet (they supported IPv6) already support IPv6?

Posted by jpluimers on 2026/01/12

I am writing this early 2025, shortly after Odido introduced “Klik & Klaar” for EUR 25/month: yet another of their internet products, this time over 5G, and yet again: no IPv6 support, just like their DSL and fiber products.

This post is a reminder to check if by now Odido has started supporting IPv6.

I know that at the time of writing, of the large Dutch mobile providers, only KPN supported IPv6, but both Vodafone and Odido didn’t. However, for Vodafone it is not a technical limitation: their bean counters need an upgrade to their billing system. The Odido back-haul technically isn’t ready for IPv6 at all.

Regrettably, The Netherlands has been behind on IPv6 adoption, which is a shame for a knowledge worker country. UK, Belgium, Germany, France, Greece, Hungary and even Russia are doing far better on IPv6 adoption:

Hopefully that has changed by now.

Edit 20261214: no, that has not changed, see a reaction at [WaybackFailed/ArchiveFailed] Odido verhoogt prijs van Klik&Klaar met 1 euro naar 26 euro per maand – Tweakers (which regrettably can neither be archived in the Wayback Machine nor Archive.is):

En Odido heeft ook nog eens geen IPv6. Anno 2026 loop je dan echt enorm achter.

Translated:

And Odido still does not support IPv6. Anno 2026, they are far behind.

Related / background information:

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Posted in FreedomInternet, Internet, ISP, KPN, Odido (ex Dutch T-Mobile), Power User, Tele2, xs4all, Ziggo/UPC/A2000 | 1 Comment »

WireGuard site-to-site VPN between GL.iNET and pfSense

Posted by jpluimers on 2026/01/12

Some links and notes that might help me getting WireGuard site-to-site VPN working between GL.iNET and pfSense.

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Posted in GL.iNet, GL.iNET GL-SFT1200, Hardware, Network-and-equipment, Power User, VPN, Wireguard | Leave a Comment »

Empirical units, π, 𝑒 and 𝜙 (pi, e, and phi)

Posted by jpluimers on 2026/01/09

Being a non-native English speaker and having monaural hearing¹, the first time visiting the USA I thought they mentioned Empirical Units² when they tried to explain miles, feet and other measurement units they use on their island.

Then I learned they are in fact United States customary units but in the USA, they actually name those Imperial Units, implying that the UK still has a very strong influence on the USA. In reality, there are differences³ between Imperial Units and United States customary units to keep things in the USA practical (or lazy if you want), so I will keep calling their system Empirical Units as it is more fit for purpose (can’t name them Freedom Units any more given their Project 2025 regime).

Anyway, quite a while ago there was this cool XKCD “The Maritime Approximation” (image on the right) including only Imperial Units holding for Empirical Units as well: π mph ≈ 𝑒 kn (let’s use ISO unit symbols here, shall we) which is correct to < 0.5%.

Recently, I learned that with the same accuracy, there is a golden ratio between metric and Imperial/Empirical Units: 𝜙 km = 1 mi, also correct to < 0.5%.

Kevlin Henney wrote two great blog posts on these explaining way more background information:

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Posted in LifeHacker, Power User | Leave a Comment »

Fontendo (@Fontendou) / Twitter: Identifying & documenting fonts, obscure and otherwise from video games and other media.

Posted by jpluimers on 2026/01/09

Interesting as I know very little about fonts in Japan and the evolution:

[Wayback/Archive] Fontendo (@Fontendou) / Twitter

Identifying & documenting fonts, obscure and otherwise from video games and other media.

It is by [Wayback/Archive] Kaihatsu (@KaihatsuYT) / Twitter

Creativity through culture, & cultural literacy through games. Type designer in Japan.

Via: [Wayback/Archive] What’s the deal with this font? – YouTube

–jeroen

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Posted in Font, Power User | Leave a Comment »

How to Do a UDP Ping in Linux

Posted by jpluimers on 2026/01/07

Often connections are TCP based, but sometimes UDP is all you have to test with, so I was quite surprised that testing that was quite forward. The solutions by [Wayback/Archive] How to Do a UDP Ping in Linux works on any platform where you can have nmap or netcat on installed (which by now is almost all platforms including Windows):

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Posted in *nix, *nix-tools, Apple, BSD, Mac OS X / OS X / MacOS, netcat, nmap, Power User, Windows | Leave a Comment »

pierogi engineering – YouTube – search – hard drive

Posted by jpluimers on 2026/01/06

The algorithm got me to the first video of this list: [Wayback/Archive] pierogi engineering – YouTube – search – hard drive

It’s similar to a longer second video that also does balancing using the gyroscopic effect of the moving platters.

Nice!

Video links:

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Posted in 18650, Batteries, Development, Hardware, Hardware Development, HDD, Li-Ion, Power User | Leave a Comment »

A few pfSense quirks I got used to over the years

Posted by jpluimers on 2026/01/06

Everytime when installing a pfSense router from scratch, I seem to re-learn a few of the below quirks. So it was finally time to document them (:

Quite a few of my pfSense configurations are just doing routing between various networks, should not provide DHCP leases and do not always need or have a WAN connected (i.e. they are LAN-only).

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Posted in Communications Development, Conference Topics, Conferences, Cyberchef, Development, DHCP, Encoding, Event, Hardware, HTTP, Internet protocol suite, MikroTik, Network-and-equipment, pfSense, Power User, routers, Software Development, SSH, TCP, TLS, UDP | Tagged: | Leave a Comment »

MacOS (at least 2023 and younger): solution for (TrueType) fonts added through MacOS built-in Font Book not showing up in Pages or Preview

Posted by jpluimers on 2026/01/05

It took me a few queries to find the correct online solution for this problem: after adding a TrueType (and it’s extension: OpenType) font using the built-in MacOS Font Book, they do not show up in Pages or Preview, not even after validating the fonts in Font Book.

Solutions:

  1. reboot (found this out myself)
  2. killing the fontd font daemon from the Activity Monitor
  3. restart font daemon (found out via the link below)
    launchctl kickstart -k gui/`id -u`/com.apple.xtyped

The last one does not work on my Apple Silicon machine, the first two work fine.

For Preview, you have to Force Quit it then start it (so it re-opens all the previous files) to take effect.

I needed this, because I

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Posted in Apple, Barcode, Development, Font, KIX, Lucida Console, Mac, Mac OS X / OS X / MacOS, macOS 13 Ventura, macOS 14 Sonoma, Power User, RM4SCC, Software Development | Leave a Comment »

Product Comparison – GL.iNet and their products I have

Posted by jpluimers on 2026/01/05

At the time of writing (during the Covid-19 Pandemic) the [Wayback/Archive] Product Comparison – GL.iNet contains the below products.

I got 3 of them (2 are variations of the same model) and their quality/price ratio is great, even with the prices that risen during the 2020-onwards global chip shortage.

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Posted in Ethernet, GL-AR300M, GL.iNet, GL.iNET GL-SFT1200, Hardware, Network-and-equipment, Power User | Leave a Comment »