Archive for the ‘JavaScript/ECMAScript’ Category
Posted by jpluimers on 2025/11/27
A while ago, I mentioned a 404-text simulating the Marvin the Paranoid Android as a side-line on a PlantUML post.
While categorising my ASCII art posts, I came across it, and it was published before I started archiving blog links in the Wayback Machine and Archive.is as much as possible.
Back during categorising, I added a few of those archived links, then made a note to research deeper.
So later, I got to that digging and did some digital spelunking, restored the text from an archived page and the underlying JavaScript code that simulated the text being typed on a “terminal”.
Then I did some more spelunking to the oldest usage I could find.
Here are the results:
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Posted in ASCII art / AsciiArt, Development, Fun, HTML, JavaScript/ECMAScript, Meme, Scripting, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2025/11/13
While doing some ASCII art blog-post drafts cleanup, I bumped into the (now deleted) [Wayback/Archive] Best 404 page ever? : r/ProgrammerHumor which pointed to the (also now deleted).
I got there via my (not deleted!) blog post Why I like PlantUML.
So I dug up the old archived copy of that PlantUML 404-page and made gist out of it.
I soon realised this was all encoded stuff, seemingly a mix of a ROT13 variation and some other shifting around.
Luckily the original page mentioned in the Reddit post was way easier, so I put that in a gist too.
Bot are below the blog-signature. Enjoy!
Oh, and the full text of course above the signature:
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Posted in ASCII, ASCII art / AsciiArt, CSS, Development, Encoding, Fun, HTML, HTML5, JavaScript/ECMAScript, Scripting, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2025/11/11
Earlier this year I bumped into [Wayback/Archive] ASCII Art Archive
This brought back instant memories about ASCII art, so in the future expect af few unfinished blog-posts that were in my “if I ever get to it archive” about it.
Let me start with my very limited ASCII art I used in late 1980s and early 1990s newsgroup and LISTSERV mailing list signature I reconstructed from a comp.virus post¹ having some very old contact data²:
o _ _ _ _ _ voice: +31-2522-20908 (18:00-24:00 UTC)
/ (_' | (_) (_' | | snail: P.S.O.
__/ attn. Jeroen W. Pluimers
P.O. Box 266
jeroenp@rulfc1.LeidenUniv.nl 2170 AG Sassenheim
jeroen_pluimers@f521.n281.z2.fidonet.org The Netherlands
Shortly after that, my main source of income moved from the command-line to GUI based tools, so I temporarily kind of lost interest in command-line tools and customs. In that period FIGlet (see below) got created, which I totally missed (though I vaguely remember the 1.0 version being named newban).
The link at the start of this blog post not only pointed me to FIGlet, but also has a lot of examples (like some [Wayback/Archive] ASCII Art Logos – asciiart.eu) of which many by ASCII artist Joan Stark, and also links to JavaScript based tools:
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Posted in ASCII art / AsciiArt, Development, Encoding, Fun, History, JavaScript/ECMAScript, Retrocomputing, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2025/11/05
As promised yesterday¹ because “what’s an open source project without its status page” (and some commercial vendors cough Embarcadero cough could highly benefit from this):
[Wayback/Archive] GitHub – louislam/uptime-kuma: A fancy self-hosted monitoring tool.
Some links (so you can try it for yourself):
--jeroen
¹ GitHub – cryptpad/cryptpad: Collaborative office suite, end-to-end encrypted and open-source.
Posted in *nix, *nix-tools, Development, JavaScript/ECMAScript, Monitoring, Power User, Scripting, Software Development, TypeScript, Vue.js | Leave a Comment »
Posted by jpluimers on 2025/11/04
Posted in *nix, *nix-tools, Cloud, CSS, Development, Google, GoogleDocs, HTML, HTML5, Infrastructure, JavaScript/ECMAScript, Monitoring, Power User, Scripting, Software Development, TypeScript, Web Development | Leave a Comment »
Posted by jpluimers on 2025/10/28
For my link archive initiated because I was trying to find out why ADS-B Exchange does not list originating and destination airports for flights, then on how to get at that data.
It is grouped in a few parts, starting with:
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Posted in Communications Development, Development, HTTP, Internet protocol suite, JavaScript/ECMAScript, JSON, REST, Scripting, Software Development, TCP, Web Development | Leave a Comment »
Posted by jpluimers on 2025/08/20
With the constant influx of JavaScript programmers, it keeps worth repeating that you should always run JavaScript in strict mode via "use strict"; (like in the past Visual Basic 6 developers should use option strict and option explicit) to forget risky JavaScript syntax like implicit ocal constants (which were removed from the documentation in the 2009 ECMAScript 5 specification for JavaScript), and every codeline should have a test code covering it, especially for comparisons involving non-strict behaviour like the use of leading zeros.
As of the succeeding 2015 standard (ECMAScript 6), octal numbers in JavaScript start with 0o or 0O followed by a series of octal digits.
Oh, and the history of octal in computing of course has to do with 6-bit systems and also lead to 6-six bit character codes including BCD character encoding..
My tweet back earlier this year: [WaybackSave/Archive] Jeroen Wiert Pluimers @wiert@mastodon.social on X: “@_ObomheseR Since JavaScript is in the group of curly based programming languages influenced by the B programming language, integer constants starting with zero are tried first in octal base. 017 octal is 15 decimal 018 octal is not possible, so becomes 18.”
Inhteritence:
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Posted in B, BASIC, C, Development, JavaScript/ECMAScript, MarkDown, Retrocomputing, Scripting, Software Development, VB6, Visual BASIC | Leave a Comment »
Posted by jpluimers on 2025/08/06
Sometimes I need [Wayback/Archive] Redirect Checker | Check your Statuscode 301 vs 302 on the command-line, so cURL to the rescue: [Wayback/Archive] linux – Get final URL after curl is redirected – Stack Overflow. The relevant portions of answers and comments further below.
TL;DR:
Since I prefer verbose command-line arguments (you can find them at the [Wayback/Archive] curl – How To Use on-line man page) especially in scripts this HTTP GET request is what works with Twitter:
% curl --location --silent --output /dev/null --write-out "%{url_effective}\n" https://twitter.com/anyuser/status/20
https://x.com/anyuser/status/20
This failed (twitter dislikes HTTP HEAD requests):
% curl --head --location --silent --output /dev/null --write-out "%{url_effective}\n" https://twitter.com/anyuser/status/20
https://twitter.com/anyuser/status/20
Notes
Given so many of my scripts now run on zsh, I added the new-line because of command line – Why does a cURL request return a percent sign (%) with every request in ZSH? – Stack Overflow. You can strip that bit.
Note that these do not perform client side redirects, so they do not return the ultimate originating URL https://x.com/jack/status/20 (which was the first ever Tweet on what was back then called twttr) as Twitter on the client-side overwrites window.location.href with the final URL. Similar behaviour for getting the Twitter user handle of a Twitter user ID, more on Twitter tricks below.
Tweet by TweetID trick via [Wayback/Archive] Accessing a tweet using only its ID (and without the Twitter API) – Bram.us.
Further reading (thanks [Wayback/Archive] vise, [Wayback/Archive] Daniel Stenberg, [Wayback/Archive] Ivan, [Wayback/Archive] AndrewF, [Wayback/Archive] Roger Campanera, and [Wayback/Archive] Dave Baird):
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Posted in *nix, *nix-tools, bash, Batch-Files, Bookmarklet, Communications Development, Conference Topics, Conferences, CSS, cURL, Development, Event, HTTP, Internet protocol suite, JavaScript/ECMAScript, Power User, Scripting, SocialMedia, Software Development, TCP, Twitter, Web Browsers, Web Development | Tagged: 76 | Leave a Comment »
The Wiert Corner - irregular stream of stuff 