Instance Property

first

The first element of the collection.

Declaration

var first: Element? { get }

Discussion

If the collection is empty, the value of this property is nil.

let numbers = [10, 20, 30, 40, 50]
if let firstNumber = numbers.first {
    print(firstNumber)
}
// Prints "10"

See Also

Accessing Elements

subscript(Int) -> Element

Accesses the element at the specified position.

var last: Element?

The last element of the collection.

subscript(Range<Int>) -> ArraySlice<Element>

Accesses a contiguous subrange of the array’s elements.

subscript(Range<Int>) -> Slice<Array<Element>>

Accesses a contiguous subrange of the collection’s elements.

subscript<R>(R) -> ArraySlice<Element>
subscript<R>(R) -> ArraySlice<Element>

Accesses the contiguous subrange of the collection’s elements specified by a range expression.

subscript((UnboundedRange_) -> ()) -> ArraySlice<Element>
func randomElement() -> Element?

Returns a random element of the collection.

func randomElement<T>(using: inout T) -> Element?

Returns a random element of the collection, using the given generator as a source for randomness.