Instance Method

removeLast(_:)

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

Declaration

mutating func removeLast(_ 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

Attempting to remove more elements than exist in the collection triggers a runtime error.

Calling this method may invalidate all saved indices of this collection. Do not rely on a previously stored index value after altering a collection with any operation that can change its length.

Complexity: O(k), where k is the specified number of elements.

See Also

Removing Substrings

func remove(at: String.Index) -> Character

Removes and returns the character at the specified position.

func remove(at: Index) -> Character

Removes and returns the element at the specified position.

Beta
func removeAll(keepingCapacity: Bool)

Replaces this string with the empty string.

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

Removes all the elements that satisfy the given predicate.

func removeFirst() -> Character

Removes and returns the first element of the collection.

func removeFirst(Int)

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

func removeLast() -> Character

Removes and returns the last element of the collection.

func removeSubrange(Range<String.Index>)

Removes the characters in the given range.

func removeSubrange(Range<Index>)

Removes the elements in the specified subrange from the collection.

Beta
func removeSubrange<R>(R)

Removes the elements in the specified subrange from the collection.

func filter((Character) -> Bool) -> String

Returns a new collection of the same type containing, in order, the elements of the original collection that satisfy the given predicate.

func drop(while: (Character) -> Bool) -> Substring

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

func dropFirst(Int) -> Substring

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

func dropLast(Int) -> Substring

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

func popLast() -> Character?

Removes and returns the last element of the collection.