Instance Method

removeFirst(_:)

Removes the specified number of elements from the beginning of the collection.

Declaration

mutating func removeFirst(_ k: Int)

Parameters

k

The number of elements to remove. k must be greater than or equal to zero, and must be less than or equal to the number of elements in the collection.

Discussion

Complexity: O(1) if the collection conforms to RandomAccessCollection; otherwise, O(k), where k is the specified number of elements.

See Also

Excluding Elements

func dropFirst(Int) -> Range<Bound>

Returns a subsequence containing all but the given number of initial elements.

func dropLast(Int) -> Range<Bound>

Returns a subsequence containing all but the specified number of final elements.

func drop(while: (Bound) -> Bool) -> Range<Bound>

Returns a subsequence by skipping elements while predicate returns true and returning the remaining elements.

func popFirst() -> Bound?

Removes and returns the first element of the collection.

func popLast() -> Bound?

Removes and returns the last element of the collection.

func removeFirst() -> Bound

Removes and returns the first element of the collection.

func removeLast() -> Bound

Removes and returns the last element of the collection.

func removeLast(Int)

Removes the given number of elements from the end of the collection.