Randomizing an array
The function below returns a random number between 0 and the given argument:
import Foundation
func randomFromZeroTo(number: Int) -> Int {
return Int(arc4random_uniform(UInt32(number)))
}
Use it to write a function that shuffles the elements of an array in random order. This is the signature of the function:
func randomArray(array: [Int]) -> [Int]
The answer is below:
func randomArray(array: [Int]) -> [Int] {
var newArray = array
for index in 0..<array.count {
let randomIndex = randomFromZeroTo(array.count)
let value = newArray[index]
newArray[index] = newArray[randomIndex]
newArray[randomIndex] = value
}
return newArray
} 原文链接：https://www.f2er.com/swift/324486.html