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 from the collection. k must be greater than or equal to zero and must not exceed the number of elements in the collection.

Discussion

var bugs = ["Aphid", "Bumblebee", "Cicada", "Damselfly", "Earwig"]
bugs.removeFirst(3)
print(bugs)
// Prints "["Damselfly", "Earwig"]"

Calling this method may invalidate any existing indices for use with this collection.

Complexity: O(n), where n is the length of the collection.

See Also

Removing Elements

func remove(at: Int) -> Element

Removes and returns the element at the specified position.

func removeFirst() -> Element

Removes and returns the first element of the collection.

func removeLast() -> Element

Removes and returns the last element of the collection.

func removeLast(Int)

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

func removeSubrange(Range<Int>)

Removes the elements in the specified subrange from the collection.

func removeSubrange<R>(R)

Removes the elements in the specified subrange from the collection.

func removeAll(where: (Element) -> Bool)

Removes all the elements that satisfy the given predicate.

func removeAll(keepingCapacity: Bool)

Removes all elements from the array.

func popLast() -> Element?

Removes and returns the last element of the collection.