andrew r. louis

notes from the middle of figuring things out.

writing

the perceptron: no thoughts, just dot products

It’s just y = mx + b with a God complex.

2026-01-11perceptronmachine-learninglinear-algebraneural-networks

when the linked lists go dancing

stationary data, moving relationships.

2026-01-23data-structuresmemoryperformancesystems-programming

the shape of stuck

an attempt to deconstruct the feeling of being stuck working a problem

2026-01-23algorithmsproblem-solvingdescarteskahneman

x & (x − 1): the bit you lose

Subtract 1, AND with the original, and the lowest set bit vanishes. A worked walkthrough of the mechanism.

2026-02-17bit manipulationalgorithms