Returns a subsequence, up to the specified maximum length, containing the initial elements of the collection.
- Xcode 8.0+
- Swift Standard Library
The maximum number of elements to return.
maxmust be greater than or equal to zero.
A subsequence starting at the beginning of this collection with at most
If the maximum length exceeds the number of elements in the collection, the result contains all the elements in the collection.
Complexity: O(1) if the collection conforms to
Random; otherwise, O(k), where k is the number of elements to select from the beginning of the collection.