Hacker News: jasmcole

New comment by jasmcole in "That time when I failed the Microsoft interview"

jasmcole — Tue, 04 Aug 2026 15:15:00 +0000

The fastest path involves a small dip, though deriving that fact is non-trivial!

Here's one of my old blog posts where I do the derivation:

https://jasmcole.com/2020/04/13/briechistochrone

New comment by jasmcole in "7.1 Earthquake in Japan"

jasmcole — Tue, 28 Jul 2026 09:07:54 +0000

I'm in Busan, though I didn't feel anything. (I was on the beach at the time though.)

WebGPU simulation of a magnetic table clamp

jasmcole — Thu, 04 Jun 2026 07:52:04 +0000

Article URL: https://jasmcole.com/2026/05/30/clamperes-law

Comments URL: https://news.ycombinator.com/item?id=48395522

Points: 1

# Comments: 0

New comment by jasmcole in "My Browser WASM't Prepared for This. Using DuckDB, Apache Arrow and Web Workers"

jasmcole — Sun, 06 Apr 2025 14:33:58 +0000

We use the WASM build of DuckDB quite extensively at Count (https://count.co - 2-3m queries per month). There are a couple of bugs we've noticed, but given that it's pretty much maintained by a single person seems impressively reliable!

New comment by jasmcole in "Make a "Magic Eye" image using Excel"

jasmcole — Sun, 08 Dec 2024 14:46:24 +0000

Wow! I just checked your CV (we were at Cambridge at the same time :) ), and I will never dismiss a Geography degree again!

New comment by jasmcole in "WebGPU-Based WiFi Simulator"

jasmcole — Sun, 20 Oct 2024 21:05:27 +0000

Hey, if you click through to one of the example simulations you'll be able to change the visualization from waves to time-averaged power density, which should be closer to what you're looking for.

New comment by jasmcole in "WebGPU-Based WiFi Simulator"

jasmcole — Sun, 20 Oct 2024 21:04:09 +0000

Thanks! If you navigate to one of the example simulations, you'll be able to change the instantaneous field visualisation to one of time-averaged power density, which sounds closer to what you're looking for.

The cool thing about the speed of WebGPU is that you can drag things around and watch changes in real-time, even if you have to average lots of simulation steps per rendered frame.

New comment by jasmcole in "WebGPU-Based WiFi Simulator"

jasmcole — Sun, 20 Oct 2024 20:18:24 +0000

Interesting! I have a desktop 3070 and hear the same. I don't hear anything on a Mac M1 though.

New comment by jasmcole in "WebGPU-Based WiFi Simulator"

jasmcole — Sun, 20 Oct 2024 20:06:47 +0000

Definitely the vibe I'm going for!

New comment by jasmcole in "WebGPU-Based WiFi Simulator"

jasmcole — Sun, 20 Oct 2024 19:39:52 +0000

Good question! This is actually a numerical solver for a few coupled partial differential equations - the method in this context (electromagnetism) is called FDTD. It's implemented as a WebGPU compute shader.

You absolutely could do this using WebGL2 compute shaders too, but I thought it would be fun to try this newer API.

New comment by jasmcole in "WebGPU-Based WiFi Simulator"

jasmcole — Sun, 20 Oct 2024 19:10:43 +0000

Agreed! Though support should be coming soon it seems. As a complete WebGPU novice I was really impressed with how quick it was to get going.

New comment by jasmcole in "WebGPU-Based WiFi Simulator"

jasmcole — Sun, 20 Oct 2024 18:52:31 +0000

See also the blog post here discussing this project:

https://jasmcole.com/2024/10/18/a-decade-of-wifi/

WebGPU-Based WiFi Simulator

jasmcole — Sun, 20 Oct 2024 18:01:43 +0000

Article URL: https://wifi-solver.com

Comments URL: https://news.ycombinator.com/item?id=41897214

Points: 335

# Comments: 84

New comment by jasmcole in "The moon blew up without warning and for no apparent reason (2017)"

jasmcole — Fri, 20 Sep 2024 07:31:53 +0000

Author here - amazing how this old post comes back around! I know this book is a bit divisive with the big time jump, but you can't argue with the opening line.

Shameless plug - I've become a better engineer since then, and if you'd like to work with me check out this role I'm hiring for:

https://jobs.ashbyhq.com/count/d49bdc38-96ea-4dbd-9ab5-ae4f5...

New comment by jasmcole in "Self-Serve Dashboards"

jasmcole — Tue, 11 Jun 2024 16:49:06 +0000

If you're interested in a mix of SQL, Python, DuckDB and low-code interfaces to SQL databases, you may want to check out https://count.co

New comment by jasmcole in "Ask HN: Help me find spreadsheet software I found on HN"

jasmcole — Sat, 01 Jun 2024 22:32:30 +0000

https://count.co perhaps?

New comment by jasmcole in "Pyodide 0.26 Release"

jasmcole — Tue, 28 May 2024 07:17:38 +0000

We use Pyodide at https://count.co and think it's pretty amazing! Congrats on the new release. I read about the snapshot support for Cloudflare workers and assumed it was a feature that Cloudflare had developed - the fact it may be coming to all users of Pyodide is great news.

New comment by jasmcole in "The new local data stack: Integrating Dagster, dbt and DuckDB"

jasmcole — Thu, 14 Dec 2023 17:11:18 +0000

Thanks for the heads up - a page more focussed on dbt specifically is here:

https://count.co/product/data-modeling/

and associated blog post:

https://count.co/blog/how-we-made-data-modeling-multiplayer/

New comment by jasmcole in "The new local data stack: Integrating Dagster, dbt and DuckDB"

jasmcole — Thu, 14 Dec 2023 13:07:01 +0000

If you're interested in interrogating dbt models using DuckDB, you may be interested in some new dbt features we've recently released at https://count.co

Show HN: Multiplayer Data Modeling

jasmcole — Thu, 30 Nov 2023 13:40:46 +0000

Hi HN, after seeing a lot of data engineering discussion here I thought it would be interesting to share a new feature I've been working on at Count (https://count.co).

We've made possible to import and execute dbt models, compiling them on the fly with a custom compiler, and view results alongside other collaborators in real time.

We built this because we heard feedback from our customers that debugging and iterating models with colleagues was painful and slow, and we thought that Count could be a great place to improve that workflow.

The link above goes to a blog post I wrote on this feature with some technical background, and you can read more generally about Count here:

https://count.co/product/data-modeling/

Comments URL: https://news.ycombinator.com/item?id=38473376

Points: 3

# Comments: 0