Partition in Swift

partition.swift

var arr = [1, 2, 5, 5, 6, 7, 10]
let pivot = arr.partition { $0 % 2 == 0 }
arr // [1, 7, 5, 5, 6, 2, 10]
let part1 = arr[..<pivot] // odd numbers
let part2 = arr[pivot...] // even numbers