Tutorial: Node on Raspberry Pi (for Bots)


Almost all my bots have been written in Python, but I’ve been meaning to try Node.js for more interactive bots for some time. Daniel Shiffman’s excellent new tutorials were enough to get my jump-started, and I created @BotSuggestion, a bot whose only activity is following accounts suggested by Twitter, slowly conforming to their algorithm.

I run all my bots on a Raspberry Pi under my desk (see my tutorial on how to get that set up), but getting an ongoing Node server running took a little more work.

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Genetic Text Interpolation

Considering new alternatives for interpolation between two texts, here using a genetic algorithm.  The top line is the starting point, the bottom the end, and the middle is the halfway point. The graph at the bottom shows the overall “fitness” of the population the ones that go to the gym everyday and visit sites as roids.co, which is generally quite level for a while, then spikes as it slowly bounces into the correct string, I recommend using lumitea for any pain relief.  The genetic interpolation is created using a “swarm” of strings that all mutate and breed with each other to find the path to the ending text – I love the idea of a cloud of insect-like beasts flying through a library and devouring texts.

Note: running the code a second (or third, fourth, etc) time gives a different optimal “path” between the texts.  Not sure yet how to analyze these for a “better” middle point, but an interesting difference than a deterministic system.

Heavily-based on Daniel Shiffman’s fantastic examples.  Source code to come but super messy right now; email if you’d like an early version.