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arnaud / sequence.js
Created November 13, 2022 00:15
Thue-Morse sequence in JavaScript
[...Array(8)].reduce(a=>[...a,...a.map(i=>+!i)],[0])
// => 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 1 0 0…

How to setup a practically free CDN using Backblaze B2 and Cloudflare

⚠️ Note 2023-01-21
Some things have changed since I originally wrote this in 2016. I have updated a few minor details, and the advice is still broadly the same, but there are some new Cloudflare features you can (and should) take advantage of. In particular, pay attention to Trevor Stevens' comment here from 22 January 2022, and Matt Stenson's useful caching advice. In addition, Backblaze, with whom Cloudflare are a Bandwidth Alliance partner, have published their own guide detailing how to use Cloudflare's Web Workers to cache content from B2 private buckets. That is worth reading,

@coderanger
coderanger / README.md
Last active August 18, 2023 18:33
How to patch Ubuntu for Heartbleed

How to patch Ubuntu for Heartbleed

  1. sudo apt-get update
  2. sudo apt-get install -y libssl1.0.0 openssl
  3. openssl version -a and confirm the "built on" date is >= 2014-04-07
  4. sudo lsof -n | grep ssl | grep DEL and restart all listed services.

Repeat #4 until no results are returned.