Function isNonEmpty

isNonEmpty<E>(array: readonly E[]): array is readonly [E, E]

Type guard that checks if an array is non-empty.

Type Parameters

E

Parameters

array: readonly E[]

Returns array is readonly [E, E]

Example

const users: readonly Readonly<{ id: number }>[] = [{ id: 1 }] as const;

const emptyUsers: readonly Readonly<{ id: number }>[] = [] as const;

assert.isTrue(Arr.isNonEmpty(users));

assert.isFalse(Arr.isNonEmpty(emptyUsers));

if (Arr.isNonEmpty(users)) {
  assert.deepStrictEqual(users[0], { id: 1 });
}