Function isEmpty

isEmpty<E>(array: readonly E[]): array is readonly []

Type guard that checks if an array is empty.

Type Parameters

E

Parameters

array: readonly E[]

Returns array is readonly []

Example

const emptyNumbers: readonly number[] = [] as const;

const words = ['Ada', 'Lovelace'] as const;

assert.isTrue(Arr.isEmpty(emptyNumbers));

assert.isFalse(Arr.isEmpty(words));

if (Arr.isEmpty(emptyNumbers)) {
  assert.deepStrictEqual(emptyNumbers, []);
}