Type Alias IsIndexedList<L>

IsIndexedList: L extends readonly any[] ? true : false

Test whether a list-like structure is index-based.

Type Parameters

L
List-like type

Remarks

Returns true for arrays and readonly arrays.

Example

type A = IsIndexedList< number[] >;                 // true
type B = IsIndexedList< ReadonlyArray< string > >;  // true
type C = IsIndexedList< Set< boolean > >;           // false