Instance Method


Returns a random element of the collection.


func randomElement() -> MLDataTable.Row?

Return Value

A random element from the collection. If the collection is empty, the method returns nil.


Call randomElement() to select a random element from an array or another collection. This example picks a name at random from an array:

let names = ["Zoey", "Chloe", "Amani", "Amaia"]
let randomName = names.randomElement()!
// randomName == "Amani"

This method is equivalent to calling randomElement(using:), passing in the system’s default random generator.

Complexity: O(1) if the collection conforms to RandomAccessCollection; otherwise, O(n), where n is the length of the collection.

See Also

Accessing Rows

var first: MLDataTable.Row?

The first element of the collection.

var last: MLDataTable.Row?

The last element of the collection.

func randomElement<T>(using: inout T) -> MLDataTable.Row?

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

subscript(Range<Int>) -> Slice<MLDataTable.Rows>

Accesses a contiguous subrange of the collection’s elements.

subscript<R>(R) -> Slice<MLDataTable.Rows>

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