Many Hard LeetCode Problems Are Easy Constraint Problems
September 10, 2025 Use the right tool for the job. In my first interview out of college I was asked the change counter problem: Given a set of coin denominations, find the minimum number of coins required to make change for a given number. IE for USA coinage and 37 cents, the minimum number is […]
3D modeling with paper
August 31, 2025 Over the past several years, I’ve enjoyed the hobby of paper modeling (or papercraft), the art of creating 3D models from cut and glued parts from paper sheets. This hobby is a superset of origami, in that it allows for cutting and gluing, as well as for multiple sheets of paper for […]
The treasury is expanding the patriot act to attack Bitcoin self custody
Marty’s Bent via The Rage We warned a couple of months ago when the Trump administration’s “Crypto Brief” was released that there was some language in the brief that advised the government to expand the Patriot Act to account for digital assets. Well, it looks like FinCen and the Treasury have been working on guidelines […]
PythonBPF – Writing eBPF Programs in Pure Python
Introduction Python-BPF offers a new way to write eBPF programs entirely in Python, compiling them into real object files. This project is open-source and available on GitHub and PyPI. I wrote it alongside R41k0u. Published Library with Future Plans Python-BPF is a published Python library with plans for further development towards production-ready use.You can pip […]
The Rising Sea: Foundations of Algebraic Geometry Notes
The Rising Sea: Foundations Of Algebraic Geometry Notes Here is the most recent version of the notes (September 8, 2024): pdf version. Here is an html version. (I thank Wanmin Liu for creating this version.) When referring to anything in the notes please mention the date (i.e., the version). Also, it far is better to […]
Rust: A quest for performant, reliable software [video]
The Challenge of Maintaining Curl
This article brought to you by LWN subscribers Subscribers to LWN.net made this article — and everything that surrounds it — possible. If you appreciate our content, please buy a subscription and make the next set of articles possible. Keynote sessions at Open Source Summit events tend not to allow much time for detailed talks, […]
We traded blogs for black boxes, now we’re paying for it
09/09/2025 Come listen to the “old man yelling at clouds” in me for a bit. tl;dr: The internet is changing for the worse (or getting ‘enshittified’). In this post, I write about the effects of algorithms on the public discourse to illustrate a greater point on the enshittification of the internet. Then, I offer my […]
Float Exposed
halfbfloatfloatdouble Bit Pattern Position within Significand–Exponent Range Evaluation in Base-2 (−12)2×102(2 − 2)×.2 Evaluation in Base-10 ×2×. Exact Base-10 Value Delta to Next/Previous Representable Value Delta to Next Representable Value Delta to Previous Representable Value
Toddlerbot: Open-Source Humanoid Robot
Acknowledgement The authors would like to express their gratitude to Kaizhe Hu for assembling the second instance of ToddlerBot and assisting with keyframe animation and demo recording. We also extend our thanks to Huy Ha, Yen-Jen Wang, Pei Xu, and Yifan Hou for their insightful discussions on locomotion, and to Sirui Chen, Chen Wang, and […]