Type Alias MutableArrayAtLeastLen<N, Elm>

MutableArrayAtLeastLen: Mutable<ArrayAtLeastLen<N, Elm>>

Creates a mutable array type that is guaranteed to have at least N elements of type Elm.

Type Parameters

N extends number
The minimum length of the array (must be a non-negative integer literal).
Elm
The type of elements in the array.

Returns

A mutable array type [Elm, ..., Elm, ...Elm[]] with at least N elements.

Example

type AtLeast2Numbers = MutableArrayAtLeastLen<2, number>; // [number, number, ...number[]]
const valid: AtLeast2Numbers = [1, 2];
const alsoValid: AtLeast2Numbers = [1, 2, 3, 4];
// const invalid: AtLeast2Numbers = [1]; // Error