L-System Generator

an insanely simple and effecient generator of L-system expansions.

It has O(n) space complexity where n is the number of iterations, not result length.

We can achieve it by wrapping generators into each other, which barely consumes any memory, but lets us create very big sequences

const sequence = lsys(
  "A",
  {
    A: "A-B--B+A++AA+B-",
    B: "+A-BB--B-A++A+B",
  },
  5
);

for (let i of sequence) {
  // do stuff
  console.log(i);
}