raboukhalil

I added more details about how the decoding works here: https://sandbox.bio/concepts/bwt#intuition-decoding , I'd love to hear if that is more clear now

I just added a section about the intuition behind the decoding: https://sandbox.bio/concepts/bwt#intuition-decoding , hope it helps!

Author here, nice to see the article posted here! I'm currently looking for ideas for other interactive articles, so let me know if think of other interesting/weird algorithms that are hard to wrap your head around.

Good point, thanks! I'll add a subsection about the intuition for that.

This is a podcast we recorded about the promise and perils of AI in biology, where we dive into a case where AI was used to predict enzyme function and gave results that looked really promising, but were not quite right.

Aha, I was wondering why the biowasm CDN suddenly spiked in usage today! :D

Haha thank you, headlamp seems pretty cool too!

Good morning HN! This tool lets you play with awk, grep, sed, and jq commands right in your browser. Start from the examples and explore from there!

To get these tools running in the browser, I compiled them to WebAssembly (see https://github.com/biowasm/biowasm for details). That way, the commands you type run instantaneously, and it doesn't cost me an arm and a leg to host servers that execute arbitrary commands from users :)

Hello HN, this is an interactive awk tutorial that features a terminal in the browser to simulate the real experience.

To get it running in the browser, I compiled gawk from C to WebAssembly! If you're interested in how that was done, check out the biowasm project: https://github.com/biowasm/biowasm/tree/main/tools/gawk

Thanks! It's generally easiest to do for C/C++/Rust/AssemblyScript code (other languages often need to ship things like garbage collection or an interpreter alongside it). But even with those languages, it's not always trivial to support features in the browser like file systems, threads, SIMD, etc.

Hey HN, I recently came across a very useful tutorial about jq (https://earthly.dev/blog/jq-select/) and created an interactive tutorial based on it. It features a command-line sandbox where you can safely explore and run arbitrary jq commands (it runs jq in your browser using WebAssembly).

Check it out if you want to learn how to filter, process, and wrangle JSON data. And if you happen to be getting started in bioinformatics, check out the rest of the tutorials on sandbox.bio :)

Yes please!

In case it helps you decide whether to go with a publisher or self-publish, I wrote down some thoughts about the self-publishing avenue: https://medium.com/@robaboukhalil/how-i-wrote-a-technical-bo... :)

Nice work, looks awesome! Curious whether you could use this to upload files directly to google cloud storage without having a server in the middle?

WebAssembly is an awesome technology and I'm super excited about it, but IMHO it's probably best to assume you don't need it unless you can convince yourself otherwise.

That said, here are a few examples of where it shines (warning: shameless plugs incoming):

- In data analysis apps, you can replace slow JavaScript calculations with WebAssembly and see significant speedups--I wrote this case study on my experience with that: https://www.smashingmagazine.com/2019/04/webassembly-speed-w...

- It's super helpful in porting games from languages like C/C++ to the web without having to rewrite the game from scratch. Here's a post I wrote about how to port a game like Asteroids to the web: https://medium.com/@robaboukhalil/porting-games-to-the-web-w...

- WebAssembly is really good for building playgrounds out of command line tools. Here's how I built one for the jq CLI: https://opensource.com/article/19/4/command-line-playgrounds..., the benefit being more secure than hosting it on the backend + much faster runtime

- I'm also excited to see how WebAssembly will impact work outside the browser: https://hacks.mozilla.org/2019/03/standardizing-wasi-a-webas..., especially with Function-as-a-service offerings that support Wasm like Cloudflare/Fastly workers, where the benefit is that I can write my function in any language + the time to initialize the function could be much faster

Another shameless plug: if you want a practical intro to WebAssembly, I self-published a book about it recently: http://levelupwasm.com/!

I have not received feedback that my book was too short. In my own experience, I've rarely ever completed a technical book--in fact, I've often wished they were shorter!

The landing page is static HTML hosted on GCP's cloud storage platform.

If you want to hear about the alternative approach of self-publishing, check out my post about how I wrote a WebAssembly book in 200 hours: https://medium.com/@robaboukhalil/how-i-wrote-a-technical-bo...

This is my second self-published book and I've loved this approach. It lets me focus on writing and marketing, and I get to craft every aspect of the book.

Hey HN! This is an article on how WebAssembly can enable us to port command-line tools to the web, which enables fast and interactive playgrounds!

You can find a demo at http://jqkungfu.com and the code at http://github.com/robertaboukhalil/jqkungfu

Hi HN! This is an article about using WebAssembly to speed up a web application.

As I mention in the article, WebAssembly isn't always the right tool for the job, but for our use case, it was a great fit because we were able to port an existing data analysis tool written in C to WebAssembly, and use that to replace the slow JavaScript calculations we were using initially.

Thank you! Yes I'm definitely planning on writing a post-mortem with details about sales figures in a few months.

I don’t have an example that specifically uses cmake, though similar principles apply but you’d use the emcmake utility. That said, thanks for the feedback! I’ve added that to my list of things to add to the book.

Thank you jamestimmins, that’s also my understanding of Show HN

Thanks pjmlp!

Haha, I can confirm Brendan is not the author. Just curious though, where else have you seen this book mentioned?

Thank you!

Thank you so much for the kind words!

Thank you for the tips! I'll be writing an article in coming weeks about my experience writing this book. This is the second book I self-publish, and unlike the first one, I actually tracked how much time I spent on each category of tasks (writing, editing, marketing, head scratching, etc), so the article will also include that. Stay tuned!

Thanks! Yes the book focuses on C/C++, but you don't need very much C/C++ knowledge to follow along in the book.

Most of the time, we treat C/C++ libraries as black boxes that we compile to WASM, though in some cases like Pacman, we do have to modify the original code, but you should be able to infer what we're doing from the context and the text.

Thanks! I like to self-publish mostly because I can craft the book in my own way and move faster. I also enjoy being able to touch all aspects of the book, including the design and marketing.

This is actually my second self-published book (first one was about wrangling data on the command line with bash), so it does feel natural to self-publish at this point!