# randomSplit(by:using:) Generates two generic arrays by randomly splitting the elements of the sequence. ``` func randomSplit(by proportion: Double, using generator: inout Generator) -> (ArraySlice, ArraySlice) where T == Self.Element, Generator : RandomNumberGenerator ``` ## Parameters `proportion` A proportion in the range `[0.0, 1.0]`. `generator` A random-number generator. ## Return Value A tuple of array slices. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)