Best of 2017

The blog posts Hacker News loved most in 2017. 4,763 posts.

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1989

Why is the Quintic Unsolvable?

In this article, I hope to convince you that the quintic equation is unsolvable, in the sense that I can’t write down the solution to the equation \[ ax^5 + bx^4 + cx^3 + dx^2 + ex + f = 0 \] using only addition, subtraction, multiplication, division, raising to an integer power, and taking an integer root. In fact, I…

1999

WebAssembly Raytracer

While teaching a web development class, I wanted to present some benchmarks that show the performance benefits of asm.js as well as WebAssembly. I was unfortunately not able to find a suitable reference. Therefore, I implemented a simplistic raytracer in JavaScript as well as in C++ with a similar code structure while…

2006

UIDebuggingInformationOverlay

Update, December 9, 2017: This overlay still exists, but this post’s instructions don’t work on iOS 11 and later. In an update to his excellent book, Advanced Apple Debugging and Reverse Engineering, Derek Selander describes how to get the panel working in iOS 11. He’s generously posted the chapter for free here.While…