Things on a Heap

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A Collection of Programming Ramblings by chjdev

Fanlens

The first tool of my new startup “Fanlens” just got released! Train your own little pet robot to filter your social media pages and communities!

Docker overrules UFW!

Docker, by default, directly manipulates iptables in order to work its network magic. It thus completely circumvents UFW rules! In this post I show strategies to deal with this.

HyperLogLog - Big Data™ in your Browser

In this post we’ll take a look at HyperLogLog, a probabilistic data structure that allows you to estimate the cardinality of huge data sets with minuscule memory requirements. This page is running an implementation JavaScript and uses 4kb to estimate a cardinality of up to 10,000,000 unique visitors based on 50,000,000 randomly generated visits.

The k-Means Algorithm Visualized

This quick post started as a challenge to myself: “I wonder if I can bang out a k-means implementation with visualization from memory in less than 2 game of thrones episodes…” The result is an immutable, functional implementation in ES6 including a visualization in D3.js.