MutableArray

public class MutableArray<Element> : MutableCollection, CustomStringConvertible where Element : Equatable

A modifiable array of elements.

  • A string representing the array

    Declaration

    Swift

    public var description: String { get }

  • Number of items in array

    Declaration

    Swift

    public var count: Int { get }

  • Sequence method to create an iterator for the MutableSet.

    Declaration

    Swift

    public func makeIterator() -> Array<Element>.Iterator

  • Declaration

    Swift

    public func index(after i: Int) -> Int

    Parameters

    i

    A valid index of the collection. i must be less than endIndex.

  • The position of the first element in a nonempty array.

    Declaration

    Swift

    public var startIndex: MutableArray<Element>.Index { get }

  • The array’s “past the end” position—that is, the position one greater than the last valid subscript argument.

    Declaration

    Swift

    public var endIndex: MutableArray<Element>.Index { get }

  • Accesses the element at the specified position.

    Modifies: The setter modifies self.

    Effects: The setter updates the value at index.

    Declaration

    Swift

    public subscript(index: Int) -> Element { get set }

    Parameters

    index

    The position of the element to access. index must be greater than or equal to startIndex and less than endIndex.

  • Adds a new element at the end of the array.

    Modifies: self

    Effects: adds elem to the end.

    Declaration

    Swift

    public func append(_ elem: Element)

    Parameters

    elem

    The element to append to the array.

  • Inserts a new element into the collection at the specified position.

    Modifies: self

    Effects: inserts elem at the given index.

    Declaration

    Swift

    public func insert(_ elem: Element, at index: Int)

    Parameters

    elem

    The new element to insert into the collection.
    index

    The position at which to insert the new element. index must be a valid index into the collection.

  • Removes and returns the element at the specified position.

    Modifies: self

    Effects: removes the element at index.

    Declaration

    Swift

    public func remove(at index: Int) -> Element

    Parameters

    index

    The position of the element to remove. index must be a valid index of the array.

    Return Value

    The element at the specified index.

  • Removes and returns last element in the array.

    Modifies: self

    Effects: removes the last element in the array, if exists.

    Declaration

    Swift

    public func removeLast() -> Element?

    Return Value

    The element removed, or nil if array was empty.

  • Returns a Boolean value that indicates whether the given element exists in the set.

    Declaration

    Swift

    public func contains(_ elem: Element) -> Bool

    Parameters

    elem

    An element to look for in the set.

    Return Value

    true if member exists in the set; otherwise, false.