rendezvous with cassidoo logo

rendezvous with cassidoo

Archives
Sponsor
Subscribe
January 19, 2026

🧯 "You can destroy your now by worrying about tomorrow." - Janis Joplin

Hey friends!

I hope you had a good week. Before we get scooting: Would you mind doing me a favor and replying to this email (or a future issue, doesn't have to be this one) on occasion? Even if it's to just say "hey" or a joke. It'll help with the newsletter's reputation on The Internet. Annnnyyyway thanks in advance, let's surf the web!

Was this forwarded to you? You can subscribe here!


Web links of the week

Using Caddy as a link shortener
4 CSS Features Every Front-End Developer Should Know In 2026
Can You Fetch Data with React Server Actions?
Simulating Crop Marks


Something that interested me this week

I was in Seattle this week for a team offsite! A ton of cool things are coming to the GitHub community this year (in terms of platform improvements, events, freebies, and mooore), and it was genuinely fun planning everything and seeing my team in person.

I got on a blogging kick, in between everything else! Some posts for ya:

  • Do not give up your brain
  • Appreciating Mary Cassatt now that I am a mom
  • Code Wave Build Log
  • A fun trick for getting discovered by LLMs and AI tools
  • What AI is actually good for, according to developers

Sponsor

No sponsor this week!

Check out PocketCal for your chill group scheduling needs, and Ductts for tracking how often you cry. <3


Interview question of the week

Last week, I had you sort some hungry bears! Grrreat work Marco, Muhammad, Joe, Nico, David, Ross, Miguel, rardk64, Chakradhar, Brooks, Ten, Micah, Paul, AJ, Matt, Stephen, Jacob, Sergio, Donato, John, Ridhwaan, Umar, Stephen, Varenya, Jeremias, Ender, Amine, Nick, Andrew, and Toni!

This week's question:
Given a string str, find a contiguous substring of length 10 whose characters can be bijectively mapped to the moves {U,D,L,R,B,A} so that the substring decodes to the Konami code "UUDDLRLRBA" (a character always maps to the same move, and two different moves can’t share a character). Return a valid mapping as an object.

Example:

konamiMapping("xx2233454590yy11110")
> { "0": "A", "2": "U", "3": "D", "4": "L", "5": "R", "9": "B" }

konamiMapping("sduwahoda22ii0d0dbn")
> { "0": "L", "2": "U", "i": "D", "d": "R", "b": "B", "n": "A" }

(you can submit your answers by replying to this email with a link to your solution, or share on Bluesky, Twitter, LinkedIn, or Mastodon)


Cool things from around the internet

The Engineer to Executive Translation Layer
How Hackers Are Fighting Back Against ICE
SINGAKBD Gundamhaku Typing Sounds (Cherry MX Brown / BSUN Tai Chi) (video)
Photos Capture the Breathtaking Scale of China’s Wind and Solar Buildout


Joke

What happened when the scientist mixed crab DNA with cheetah DNA?
Things went sideways really fast!


That's all for now, folks! Have a great week. Be safe, make good choices, and be brave!

Special thanks to Ben, Kinetic Labs, and Marta for supporting my Patreon and this newsletter!

cassidoo

website | blog | github | bluesky | twitter | patreon | twitch | codepen | mastodon

Don't miss what's next. Subscribe to rendezvous with cassidoo:
Share this email:
Share on Twitter Share on LinkedIn Share on Hacker News Share on Reddit Share via email
GitHub
https://cassido...
LinkedIn