MinimalTicTacToe

Derivation of a minimal size tree for playing perfect tic tac toe

Problems using SSIM for image quality comparisons

Variation among SSIM implementations make comparing results a mess. This version matches the output of the original, unlike most of those in common use as of 2023.

A better quadratic formula algorithm

A robust algorithm for computing roots of quadratic equations, much better than common code.

Rtk Gps Project

I built a RTK-GPS gadget and wrote enough software to do basic GNS tasks such as finding distances, decoding GPS NMEA and RTCM messages, finding intersections, and doing boundary detection.

Chris Lomont's lines of code over time

Over decades I’ve written a lot of personal code. I made a bar chart race showing how many lines I’ve written in different languages over time.

New C# syntax and features

Here’s a brief summary of C# features by version.

Intro to Functional Programming with F#

This talk is an introduction to functional programming, with a focus on F#. The first section covers functional programming history, techniques, and benefits. The second part shows how this is used in F#, covering F# syntax and some special features like Type Providers, Units of Measure, and performance compared to C#.

The third section goes into mind-bending topics like immutable data structure implementation, currying, the y-combinator, contravariant and covariant functors, and category theory.

Generating Uniform Random Numbers on [0,1]

How does one generate uniform random numbers in [0,1] using IEEE 754 floating point formats? It’s tricky.

Test site features

A post to test site features such as tables, math, code…