Type Alias IsTuple<T>

IsTuple: T extends readonly any[]
? number extends T["length"] ? false : true
: false

Type guard: detect whether a type is a tuple.

Type Parameters

T
Type to check

Remarks

Distinguishes tuples from arrays by inspecting the length property.

Example

type A = IsTuple< [ string, number ] >;  // true
type B = IsTuple< number[] >;            // false