Erik Bernhardsson    About

Software Engineers and Automation

Every once in a while when talking to smart people the topic of automation comes up. Technology has made lots of occupations redundant, so what’s next? Switchboard operator, a long time ago What about software engineers? Every year t...

coin2dice

Here’s a problem that I used to give to candidates. I stopped using it seriously a long time ago since I don’t believe in puzzles, but I think it’s kind of fun. Let’s say you have a function that simulates a random coin flip. It retu...

Benchmark of Approximate Nearest Neighbor libraries

Annoy is a library written by me that supports fast approximate nearest neighbor queries. Say you have a high (1-1000) dimensional space with points in it, and you want to find the nearest neighbors to some point. Annoy gives you a way t...

More Luigi alternatives

The workflow engine battle has intensified with some more interesting entries lately! Here are a couple I encountered in the last few days. I love that at least two of them are direct references to Luigi! Airflow (Blog Post) (GitHub) A...

3D in D3

I have spent some time lately with D3. It’s a lot of fun to build interactive graphs. See for instance this demo (will provide a longer writeup soon). D3 doesn’t have support for 3D but you can do projections into 2D pretty easily. It’s...

The hardest challenge about becoming a manager

Note: this post is full of pseudo-psychology and highly speculative content. Like most fun stuff! I became a manager back in 2009. Being a developer is fun. You have this very tangible way to measure yourself. Did I deploy something tod...

The lane next to you is more likely to be slower than yours

Saw this link on Hacker News the other day: The Highway Lane Next to Yours Isn’t Really Moving Any Faster The article describes a phenomenon unique to traffic where cars spread out when they go fast and get more compact when they go slo...