Instance Method

removeAll(keepingCapacity:)

Replaces this string with the empty string.

Declaration

mutating func removeAll(keepingCapacity keepCapacity: Bool = false)

Parameters

keepCapacity

Pass true to prevent the release of the string’s allocated storage. Retaining the storage can be a useful optimization when you’re planning to grow the string again. The default value is false.

Discussion

Calling this method invalidates any existing indices for use with this string.

Relationships

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(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 removeLast(Int)

Removes the specified number of elements from the end 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.