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Lucas Mendelowski

@lucas.mendelowski.com

64 followers 130 following 33 posts

Developer focused on building web-applications. KRUG (Kraków Ruby Users Grup) coorganizer.

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Lucas Mendelowski @lucas.mendelowski.com · Dec 31

If one of your 2025 resolutions is to explore modern front-end solutions for #rails, I’ve got you covered. Check out my blog post and repo comparing #Hotwire, #htmx , #unpolyjs and #inertiajs.

github.com/lcmen/hotwir...
www.mendelowski.com/blog/2024/11...

GitHub - lcmen/hotwire-htmx-unpoly: Simple TODO application built with Rails to compare Hotwire, HTMX and Unpoly

Simple TODO application built with Rails to compare Hotwire, HTMX and Unpoly - lcmen/hotwire-htmx-unpoly

github.com

Lucas Mendelowski @lucas.mendelowski.com · Sep 11

KRUG #4 powered by Zendesk is coming with talks on MCP, AI & prompt evaluation! 🚀

📅 September 23, 18:00
📍 Zendesk, Marii Konopnickiej 29, Kraków

RSVP (required) 👉 lu.ma/krug

Don’t miss it!

Kraków Ruby Users Group · Events Calendar

View and subscribe to events from Kraków Ruby Users Group on Luma. Krakow Ruby Users Group (KRUG) - Ruby and web developers and enthusiasts meetups in Kraków. If you want to have a talk or help organ...

lu.ma

Lucas Mendelowski @lucas.mendelowski.com · Aug 13

This looks fantastic and I'd love to give it a try. Would you mind sending the access code? Thanks so much!

Lucas Mendelowski @lucas.mendelowski.com · Aug 8

What's the best way to learn about some new concept? Building a project using it! Recently, I've been interested in MCP servers, so I built one with Ruby (and `fast-mcp` gem). It allows you to query HackerNews (as what else can you do on Friday 😅).

Code: github.com/lcmen/hn-mcp/

GitHub - lcmen/hn-mcp: HackerNews MCP server built with Ruby

HackerNews MCP server built with Ruby. Contribute to lcmen/hn-mcp development by creating an account on GitHub.

github.com

Lucas Mendelowski @lucas.mendelowski.com · Aug 4

I'm still switching between NeoVim and Zed but here are my settings and keymaps:

gist.github.com/lcmen/27a756...

My Zed settings

My Zed settings. GitHub Gist: instantly share code, notes, and snippets.

gist.github.com

Lucas Mendelowski @lucas.mendelowski.com · Jul 22

No worries at all. Hope you feel better soon. Take it easy.

Lucas Mendelowski @lucas.mendelowski.com · Jul 22

How is it going so far? Also, is the pro plan generous enough with its prompt limit? Do you know if it switches to simpler models like Cursor after reaching the limit?

Lucas Mendelowski @lucas.mendelowski.com · Jun 3

Join our next KRUG meetup, powered by @rubycentral.org & Fastly, with venue support from Forte Digital

Talks:

- Michał Papis: Code UnCov & Pluginator
- @josevalim.bsky.social: Livebook - where Web, AI, and Concurrency meet

🗓️ June 10, 18:00
📍 Forte Space, Krupnicza 3, Kraków

🔗 RSVP lu.ma/0852jl2w

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Lucas Mendelowski @lucas.mendelowski.com · Jun 3

I'm glad you found it useful!

Lucas Mendelowski @lucas.mendelowski.com · Apr 1

Good spot👌. Fixed!

Lucas Mendelowski @lucas.mendelowski.com · Mar 31

Another idea inspired by the Ash Framework book: my journey into the pin operator and macros in #Elixir.

Check it out: www.mendelowski.com/blog/2025/03...

I'm not an Elixir expert, so I welcome feedback from more experienced Elixir folks. Hope you enjoy it!

Understanding the Pin Operator and Macros in Elixir - Lucas Mendelowski

Understanding the Pin Operator and Macros in Elixir by building custom DSL

www.mendelowski.com

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Lucas Mendelowski @lucas.mendelowski.com · Mar 26

That sounds awesome. I'm looking forward to it!

Lucas Mendelowski @lucas.mendelowski.com · Mar 6

How is Zed so far? I personally moved to Cursor but still miss good old days with Neovim and tmux...

Lucas Mendelowski @lucas.mendelowski.com · Mar 6

Hey @chastell.net, @tomash.eu mentioned that you were able to configure AI assistant in Vim (NeoVim?). Can you share your setup? Were you able to replicate VSCode / Cursor experience in applying changes from chat window to source files (Composer like behavior)?

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Lucas Mendelowski @lucas.mendelowski.com · Feb 20

Mine is only 278 with style of posting described as "Reply Guy" 😄. Social status: "Highly Engaging Explorer" with exceptionally high engagement, averaging 2.6 engagements per post across their follower base of 48.

Thanks for sharing the website, it's cool to see such summary!

1 1

Lucas Mendelowski @lucas.mendelowski.com · Feb 17

Recently, I started reading the "Ash Framework" book. While building the example app, I spotted an area for improvement - leading to my first-ever contribution to the 🧪 Elixir ecosystem!

My changes to @ash-hq.org and `ash_postgres` are ready for release! 🚀

#MyElixirStatus

Lucas Mendelowski @lucas.mendelowski.com · Feb 13

KRUG #1 2025 is here! Featuring three fantastic talks.

The event powered by Zendesk and serving as the unofficial kickoff to Ruby Community Conference.

📅 Feb 27, 2025 – 17:30
📍 Marii Konopnickiej 29, Kraków
🔗 More details here: lu.ma/dow2zgc5

Come for the talks, stay for the community 🚀!

KRUG #1 2025 · Luma

Hello Ruby Enthusiasts! We're kicking off 2025 with a high-caliber Kraków Ruby Users Group (KRUG) meetup, featuring three fantastic talks you don't want to…

lu.ma

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Lucas Mendelowski @lucas.mendelowski.com · Jan 2

Wow... What a surprise! Look what I found in my mailbox.
Thank you so much, @inazarova.bsky.social !
That’s so kind of you.

PS. It’s also my birthday today, so you couldn’t have picked a better day!

Lucas Mendelowski @lucas.mendelowski.com · Jan 1

What editor is that? How did you enable Prism for syntax checks? Thanks!

Lucas Mendelowski @lucas.mendelowski.com · Dec 31

GitHub - lcmen/hotwire-htmx-unpoly: Simple TODO application built with Rails to compare Hotwire, HTMX and Unpoly

Simple TODO application built with Rails to compare Hotwire, HTMX and Unpoly - lcmen/hotwire-htmx-unpoly

github.com

Lucas Mendelowski @lucas.mendelowski.com · Dec 30

That would be better turnaround for Bears than another no 1 QB from the draft.

Lucas Mendelowski @lucas.mendelowski.com · Dec 29

I know that no one asked for it, but I've added #inertiajs to the mix (with React without JSX transpilation!). Compare it with #hotwire, #htmx, and #unpoly.

The same principle as before: single controller, no build, importmap, and propshaft.

Lucas Mendelowski @lucas.mendelowski.com · Nov 19

Hey everyone! It's my first post here.

Just want to share that recently, I've built a simple TODO app with Rails to compare #hotwire #htmx and #unpoly. It follows progressive enhancement spirit (the same controller is used for all the variants). You can check it here: github.com/lcmen/hotwir...

GitHub - lcmen/hotwire-htmx-unpoly: Simple TODO application built with Rails to compare Hotwire, HTMX and Unpoly

Simple TODO application built with Rails to compare Hotwire, HTMX and Unpoly - lcmen/hotwire-htmx-unpoly

github.com

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Lucas Mendelowski @lucas.mendelowski.com · Dec 29

#TIL that #postgresql allows you to create custom aggregate functions www.cybertec-postgresql.com/en/writing-y...

Nice!

Writing your own aggregation functions

Database engines usually provide basic aggregate functions. This shows how to create your own code to calculate on the server side.

www.cybertec-postgresql.com

Lucas Mendelowski @lucas.mendelowski.com · Dec 28

I'm still using alacritty with tmux. Muscle memory dies hard.

Lucas Mendelowski @lucas.mendelowski.com · Dec 16

Thanks for explanation and happy birthday!

Lucas Mendelowski @lucas.mendelowski.com · Dec 14

What do you mean by M:N threads?