Best of 2013

The blog posts Hacker News loved most in 2013. 3,456 posts.

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2885

Compiling to Lua

We use nginx throughout our network for front-line web serving, proxying and traffic filtering. In some cases, we've augmented the core C code of nginx with our own modules, but recently we've made a major move to using Lua in conjunction with nginx. One project that's now almost entirely written in Lua is the new…

2892

Uber for Everything

San Francisco has 800,000 inhabitants. How many cordless drills are there in this city? Probably orders of magnitude more than we actually need. I bought one six months ago, used it just once. It’s now another object in a box filled with stuff. At the time I must have thought that the most convenient way to hang a…

2899

Understanding the FFT Algorithm

The Fast Fourier Transform (FFT) is one of the most important algorithms in signal processing and data analysis. I've used it for years, but having no formal computer science background, It occurred to me this week that I've never thought to ask how the FFT computes the discrete Fourier transform so quickly. I dusted…