Returns a sequence containing all but the given number of initial elements.
SDK
- Xcode 10.2+
Framework
- Swift Standard Library
Declaration
func dropFirst(_ k: Int = 1) -> DropParameters
kThe number of elements to drop from the beginning of the sequence.
kmust be greater than or equal to zero.
Return Value
A sequence starting after the specified number of elements.
Discussion
If the number of elements to drop exceeds the number of elements in the sequence, the result is an empty sequence.
let numbers = [1, 2, 3, 4, 5]
print(numbers.dropFirst(2))
// Prints "[3, 4, 5]"
print(numbers.dropFirst(10))
// Prints "[]"
Complexity: O(1), with O(k) deferred to each iteration of the result, where k is the number of elements to drop from the beginning of the sequence.