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Thursday / Oct 20th, 202210/20/2022

Challenges

Featured Challenge:
#174 — AppleSoft Basic Fractal Tree

Take a trip back in time and let's learn all about GR (graphics) and HGR (high resolution graphics) in AppleSoft BASIC on a restored Apple II+ computer! Can we render a fractal tree?

sep 12, 2022

AppleSoft Basic Fractal Tree

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A* algorithm

Coding in the Cabana is a series where I attempt challenges from my garden cabana in Brooklyn, NY. In this episode, I animate the path of the classic "space filling curve" known as the Hilbert Curve.

Hilbert Curve

Let's try implementing a famously faster sorting algorithm: the Quicksort! And visualize the process with p5.js!

Quicksort Visualization

Yes, sorting numbers can be fun! In this challenge I attempt to implement the "bubble sort" algorithm in Processing (Java) and visualize the process itself with animated lines.

Bubble Sort Visualization

In this challenge, I use my JavaScript neural network library and a genetic algorithm to train an agent to play Flappy Bird.

Neuroevolution Flappy Bird

In this multi-part coding challenge, I create a system where autonomous steering agents evolve the behavior of eating food and avoiding poison.

Evolutionary Steering Behaviors

In this two part challenge, I implement the Breadth-First Search algorithm in JavaScript. My demo application is "6 Degrees of Kevin Bacon" (finding the closest relationship between Kevin Bacon and another actor).

Breadth-First Search

In this multi-part coding challenge, I attempt an implementation of the A* Pathfinding Algorithm to find the optimal path between two points in a 2D grid.

A* Pathfinding Algorithm

In Part 1 of this multi-part coding challenge, I introduce the classic computer science problem of the Traveling Salesperson (TSP) and discuss the pitfalls with a brute force solution. In Part 2, I discuss Lexicographic Ordering and demonstrate one algorithm to iterate over all the permutations of an array. In Part 3, I apply this algorithm to a brute-force solution of the TSP problem. Every single route permutation is checked one by one. In Part 4, I attempt to create a solution to the TSP problem with a genetic algorithm, and then I add a “crossover” algorithm in Part 5.

Traveling Salesperson

In this coding challenge, I implement a "smart rockets" algorithm (based on a simulation by Jer Thorp).

Smart Rockets in p5.js