slices

func Concat[T any](s ...[]T) []T

func Empty[T any]() []T

func Filter[T any](s []T, f func(T) bool) []T

func FlatMap[T, U any](s []T, f func(T) []U) [][]U

func FlatMapConcat[T, U any](s []T, f func(T) []U) []U

func Flatten[T any](s [][]T) []T

func Len[T any](s []T) int

func Map[T, U any](s []T, f func(T) U) []U

func Range(start, end int) []int

func Single[T any](v T) []T