Air France Air Tracker

12th September 2021

When I flew with Air France from Paris CDG to Montpellier I was surprised that all seats offered Wifi, which was not mandated to switch off. Furthermore, bluetooth was not required to be turned off, and all seats offered two plugs to charge electronic devices via USB. Using Wifi on board the…

Considerations Regarding Simplifications of Saaze

2nd September 2021

This blog is built using a static-site generator called Saaze. Saaze can also serve content fully dynamic. Saaze is kind of the successor of Handle. Saaze and Handle were both written by Gilbert Pellegrom. Saaze has the following objectives: Easy to run Easy to host Easy to edit Easy to theme Fast…

YouTube: Something Went Wrong

1st September 2021

Yesterday I observed below error when accessing YouTube via my tablet: I had experienced related errors: January 2017: Youtube 500 Internal Server Error May 2017: Youtube 500 Internal Server Error For Facebook and WordPress I had observed: June 2014: Facebook Was Down on 19-Jun-2014 March 2019:…

HTML Anchor Highlighting

31st August 2021

In Alexander Six's blog I saw that you can highlight HTML anchor text with a skewed bar. Below is the solution I use in this blog. I am still struggling with my own requirement that the skeyY angle is dependent on the length of the anchor string. Currently I do not know how I can find this out. …

Bandwidth Diet for This Blog

26th August 2021

As mentioned in Speed-Tests With Pingdom.com the ratio of CSS to HTML (=content) was roughly 50:1. In my case CSS was taking 248 KB, while HTML is only 4.4 KB. Previously this blog continued to use Tailwind CSS, as started by the example for Saaze. But Tailwind CSS does not make too much sense for…

Printing COBOL Section Names

19th August 2021

1. Problem statement. Print COBOL section names, ideally title-cased. Use a Perl one-liner for this task. perl -ne 'printf("%3d %s\n",++$i,join("-",map{ucfirst lc $_}split(/\-/,$1))) if /([\-\w]+)\sSECTION\./i' COBOL-Source.cbl It will print "Working-Storage" as well,…

Generating JSON with COBOL

17th August 2021

1. Problem statement. Generate JSON from COBOL WORKING-STORAGE section memory area. GnuCOBOL can generate and parse JSON strings. Example. IDENTIFICATION DIVISION. PROGRAM-ID.…

Diagonal of Squared Jacobian

25th July 2021

Assume \(f\) is a \(m\)-vector valued function in \(n\)-variables, i.e., \(f:U\subseteq\mathbb{R}^n\to\mathbb{R}^m\). The Jacobian is given by $$ J = \begin{pmatrix} f_{x_1}^{(1)} & \cdots & f_{x_n}^{(1)} \\ \vdots & \ddots & \vdots \\ f_{x_1}^{(m)} & \cdots &…

Hashnode Markdown Bulk Import Is Troublesome

24th July 2021

1. I have written more than 300 blog posts, see sitemap. I wanted to import them into Hashnode. As all these posts were already in Markdown format, it was obvious to use the "bulk import" feature in Hashnode. The Hashnode bulk import reads a zip-file. This zip-file contains individual…

Performance Comparison C vs. Java vs. Javascript vs. LuaJIT vs. PyPy vs. PHP vs. Python vs. Perl

13th July 2021

1. Introduction. I always wanted to benchmark PHP, to confirm myself that choosing PHP as a static site generator is not a dead-end, compared, for example, against node.js. PHP 7 has already made huge performance advancements. See PHP 7: Features and Performance Comparison: Drupal - Compared to…

Calling MD4C from PHP via FFI

11th July 2021

1. Problem statement. When using one of the static site generators an important part of all of them is to convert Markdown to HTML. In my case I use Saaze, and I measured roughly 60% of the overall runtime is used for converting Markdown to HTML. I have written on Saaze here and here. When…

Brave Browser SIGSEGV Crash

29th June 2021

Today I saw a SIGSEGV error when fetching data from Twitter: After reloading the page the error was gone. I hadn't seen this kind of error before. Version used: Brave 1.25.73, Chromium: 91.0.4472.106 (Official Build) (64-bit). Revision…

Deletion Troublesome in Hashnode.com

27th June 2021

Before I moved away my blog from WordPress.com to this place, I checked whether another provider would fit my needs. See for example surge.sh, vercel.app, or netlify.app. I also looked at Hashnode.com. I liked Hashnode as it provides Markdown as input. I later learned that Hashnode also provided…

WordPress.com Bulk Update

21st June 2021

I wanted to redirect Google search results from WordPress.com to this blog. Ideally, one would add a "canonical link" in the head-tag of the HTML code. See for example stitcher.io: 07 — Be Searchable: <head> . . . <link rel="canonical"…

Ampersands in Markdown URLs

13th June 2021

In this blog I reference web-page- or image-URLs, which contain ampersands ("&"). For example, https://www.amazon.com/s?k=Richard+Stevens&ref=nb_sb_noss. Unfortunately, Markdown as specified by John Gruber does not allow this. This can be checked with John Gruber's…

Using NUC as WLAN Router

5th June 2021

I had already written about setting up an Odroid as IP router: Using Odroid as IP router. Today I powered down my second Odroid, which I had previously used as WLAN router. There was nothing wrong with the Odroid. It just drew 7W and the NUC was already running next to the Odroid. So there was no…

Matomo with Hiawatha

3rd June 2021

For this blog I use the Hiawatha web-server. I wanted to employ a web-analysis tool. For this I chose Matomo. Matomo was called Piwik previously. I already use GoAccess on which I have written in Using GoAccess with Hiawatha Web-Server. To use Matomo with Hiawatha I had to do the following: Unzip…

Generate RSS from Markdown

30th May 2021

For this blog I wanted an RSS feed. Saaze does not provide this functionality. Saaze is supposed to be "stupidly simple" by design, which I consider a plus. Since 15-Aug-2022 Simplified Saaze can generate a RSS XML feed. Simplified Saaze, so to speak, is the successor of Saaze. This post…

Configure Lighttpd With PHP and HTTPS

29th May 2021

I use the Hiawatha web-server on my servers. For example, this blog runs on Hiawatha. Recently I needed a web-server on Red Hat Enterprise. Unfortunately, Red Hat does not provide Hiawatha directly on its Satellite program, but Lighttpd was there. I also wanted to use PHP and the connection should…

Speed-Tests With Pingdom.com

23rd May 2021

As I have moved my blog from WordPress to eklausmeier.goip.de, I wanted to know if I am really getting better response times across the globe. WordPress always felt slow. Below measurements will confirm this. Pingdom.com is a monitoring and performance measurement website. See Wiki article. The…