permutations

tcmts.core.shape.permutations · #2tjggnri · term · runs anywhere

export function permutations<T>(xs: T[]): T[][] {
  if (xs.length <= 1) return [xs];
  return xs.flatMap((x, i) => permutations([...xs.slice(0, i), ...xs.slice(i + 1)]).map((p) => [x, ...p]));
}

used by

• tcmts.core.shape.matchOne