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Ben Halpern
Ben Halpern

Posted on • Updated on

Side Project Sunday! How's it going?

Let's hear about what you have going on! If you've shared your project before, what's new?

Top comments (38)

cicirello profile image
Vincent A. Cicirello

This past Monday I released v5.2.0 of Chips-n-Salsa (link to project below). That release added implementation of (1+1)-EA (evolutionary algorithm). I'm currently working on integrating and/or reimplementing my code for various crossover operators for evolving permutations into the library. Much of my existing code for this is from prior research projects with code written for very specific scheduling and other optimization problems. So in some cases at least partially reimplementing to be problem-independent as I'm integrating with the Chips-n-Salsa library. In some cases, my prior code I'm digging into I originally wrote as long ago as 20 years ago.

Chips-n-Salsa - A Java library of customizable, hybridizable, iterative, parallel, stochastic, and self-adaptive local search algorithms

The Chips-n-Salsa library includes implementations of several stochastic local search algorithms, including simulated annealing, hill climbers, as well as constructive search algorithms such as stochastic sampling; and now also includes genetic algorithms as well as evolutionary algorithms more generally. It includes several classes for representing solutions to a variety of optimization problems. For example, the library includes a BitVector class that implements vectors of bits, as well as classes for representing solutions to problems where we are searching for an optimal vector of integers or reals. For each of the built-in representations, the library provides the most common mutation operators and crossover operators for use with evolutionary algorithms. The library provides extensive support for permutation optimization problems, including implementations of many different mutation operators for permutations, and utilizing the efficiently implemented Permutation class of the JavaPermutationTools (JPT) library. Chips-n-Salsa is customizable, making extensive use of generic types, enabling using the library to optimize other types of representations beyond what is provided in the library. It is hybridizable, providing support for integrating multiple forms of local search (e.g., using a hill climber on a solution generated by simulated annealing), creating hybrid mutation operators (e.g., local search using multiple mutation operators), and classes that support running more than one type of search for the same problem concurrently using multiple threads as a form of algorithm portfolio. Chips-n-Salsa is iterative, with support for multistart metaheuristics, including implementations of several restart schedules for varying the run lengths across the restarts. It also supports parallel execution of multiple instances of the same, or different, stochastic local search algorithms for an instance of a problem to accelerate the search process. The library supports self-adaptive search in a variety of ways, such as including implementations of adaptive annealing schedules for simulated annealing, such as the Modified Lam schedule, implementations of the simpler annealing schedules but which self-tune the initial temperature and other parameters, and restart schedules that adapt to run length.

jmfayard profile image
Jean-Michel 🕵🏻‍♂️ Fayard • Edited

I spent too much time on my side project this weekend.

Thanks God, I have a wife and a dog and both look unhappy at me when I'm doing this, which is good because it gives me the opportunity to course correct, go out with the dog and cook some chocolate dessert for my wife 🍫.

team_memphis profile image team

Hi fellas! I got a new GO SDK + Python SDK featured on my open-source message broker project...
would love to find anyone who can try it out(and hopefully, want to contribute🙏🏽)

here's the contributors guideline, got some "good first issue" as well if you don't mind taking a look
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bertilmuth profile image
Bertil Muth

Pretty good! I created the first version of a library for Property Based Testing of state machines on the JVM:

Property Based Testing is much less known than example based testing, but in my view, very interesting since it covers a lot more cases.

receter profile image
Andreas Riedmüller

I did update my site for simple configurable 3d printing shapes Thanks for you feedback last Sunday!

  • The engine and language for the shapes is JSCAD V2 now, this was quite some work as it is fundamentally different from the original OpenJSCAD. I also had to rewrite the code for all shapes and make new Screenshots of every shape. Luckily I managed to build a function that automatically creates and downloads a screenshot in the right size.
  • Zooming requires holding shift now so you don’t accidentally zoom when you want to scroll
  • There is a array parameter now where you can add items with multiple parameters each, for example an array of coordinates
  • Parameters can be optional
  • The description for parameters works now
  • The documentation link was updated and I added an Imprint and contact page (Thanks Greenreader9)
  • And I made a simple logo (mostly for having a favicon 😄)

The updated editor with documentation link:
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Array parameter (for configuring the shape):
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Array parameter configuration (in the shape editor):
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Some new shapes:
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I have so many ideas for shapes, I think the next update will just be new shapes :-D

Did you know that it is actually pretty hard to name shapes? Would you instantly know what a "Hollow Cuboid with Floor" or a "Truncated Cone with Hole" is without looking at the site? I tried my best…

westernal profile image
Ali Navidi

I made a social media to share songs and working on it every day to make it better and better:

kushal_70 profile image
Kushal Magar • Edited

I made a Twitter bot that automatically generates "News Flash" videos from Tweets. Here's the Github repo.

techman09 profile image
TechMan09 • Edited

Updated my website with a new article, and some grammar updates (As well as fixing an embarrassing spelling mistake).

My secret project has improved a lot though, and I can’t wait to show it off!

troy5890 profile image
Troy Harris

I'm still pretty new to web development, but I'm currently making a simple tic tac toe game I can play with some friends as a nice party game whenever it's deployed to Netlify. Still going through learning, but it's almost time to make another side project with reviewing some anime XD

gedalyakrycer profile image
Gedalya Krycer

Started writing again! Took a year off to focus on work, but recently I have been missing writing about code, design and mental health. Recently finished reading a book on imposter syndrome and this weekend I wrote a post based on some notes I took on the first chapter. It felt good to process and reflect on the topics discussed.

gbafana25 profile image
Gareth M.

A couple weeks ago I rewrote a password manager app that I had first created using Flutter. I decided to redo it using Java and the standard Android Library because there were a few issues where some of the menus wouldn't appear correctly. I wrote an article on it here. I also uploaded a release apk here.

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beetlehope profile image
Nadia Zhuk

This weekend I hit 500 subscribers on my YT channel:
Check it out if you are interested in content about building a career in tech. I'll be glad to have you follow my journey.

conorsheehan1 profile image
Conor Sheehan

I made an Irish version of the NYTimes Spelling Bee game:

You can play it here:

I wrote an article about some of the challenges setting up the domain:

Will probably do another about the game itself soon too. It's all open source and translated with i18n so should be super easy to fork and make a version in your language of choice!

cleveroscar profile image
Oscar Ortiz

I managed to get my Nasa App up and running.

I just added the mars rover feature too. Feel free to check it out

Nasa App

receter profile image
Andreas Riedmüller

I like the photo of the day page. I tried to bookmark it but it says site not found if I go directly to

I do like that I need to click a button before the image comes up. That way I could use it as a start page and it does not distract me by default but only when I consciously click the button. Interesting concept when you think about it.

cleveroscar profile image
Oscar Ortiz

Yea I like to have the user engage a bit more. Thank you for checking it out.

And yea unfortunately due to it being still a dummy url and not a real domain url google things of it as a spam and won't allow it to save in majority browsers. I can't even share the link on facebook or linkedin cause they think its a spam.

Thank you for your comment.

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receter profile image
Andreas Riedmüller • Edited

Hm, I think the url should not be an issue but you need to redirect all traffic to index for the frontent router to work.

First paragraph of this article should be enough in your case:

naira_gezhoyan profile image
Naira Gezhoyan • Edited

Great idea to showcase our side projects and explore amazing devs' interesting ideas for projects. Let me share mine - Build an uNFT marketplace with Next.js, Cosmic and Stripe integration