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Discussion on: Daily Challenge #199 - List of All Rationals

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Empereol • Edited on

TypeScript

function* allRationals(): Generator<[number, number]> {
  let rationals: [number, number][] = [[1, 1]];

  let i = 0;
  while (true) {
    const rational = rationals[i];
    yield rational;
    rationals.push([rational[0], rational[0] + rational[1]]);
    rationals.push([rational[0] + rational[1], rational[1]]);
    i++;
  }
}

Edit: Removed rationals.shift() in favor of keeping track of the rationals[i]... It's much faster since it doesn't have to move tons of array items when accessing higher values like the 100000th value... Went from ~28000ms to ~180ms.