Instance Property


A Boolean value indicating whether the collection is empty.


var isEmpty: Bool { get }


When you need to check whether your collection is empty, use the isEmpty property instead of checking that the count property is equal to zero. For collections that don’t conform to RandomAccessCollection, accessing the count property iterates through the elements of the collection.

let horseName = "Silver"
if horseName.isEmpty {
    print("I've been through the desert on a horse with no name.")
} else {
    print("Hi ho, \(horseName)!")
// Prints "Hi ho, Silver!")

Complexity: O(1)

See Also

Inspecting an Array

var count: Int

The number of elements in the array.

var capacity: Int

The total number of elements that the array can contain without allocating new storage.