Typescript: Can I define an n-length tuple type?

Question

I am creating a shogi game board using Typescript. A shogi board has 9 ranks and files.

I\'d like to assert a 9x9 multidimensional array as a type to ensure both the

Answer 1

type PushFront = (
  ((front : FrontT, ...rest : TailT) => any) extends ((...tuple : infer TupleT) => any) ?
  TupleT :
  never
)

type Tuple = {
  0 : OutputT,
  1 : Tuple>
}[
  OutputT["length"] extends LengthT ?
  0 :
  1
]

//type t3 = [string, string, string]
type t3 = Tuple
//type length = 0 | 3 | 1 | 2
type length = Partial>['length']

Add a generic way to specify length of a tuple type #issuecomment-513116547