itertools

func Permutations ¶

func Permutations[T any](pool []T, r int) iter.Seq[[]T]

Permutations returns an iterator over all length-r permutations (without replacement) drawn from the values produced by seq, in lexicographic index order (matching Python/itertools behavior). If r > n, it yields nothing. If r == 0, it yields a single empty slice.