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 { id: number }[] = [{ id: 1 }];
const emptyUsers: readonly { id: number }[] = [];

assert.ok(Arr.isNonEmpty(users));
assert.notOk(Arr.isNonEmpty(emptyUsers));

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