[swift3] Array Extesions

initializer_with_generator.swift

extension Array {
   /**
    Create a new array containing the generating element.
    
    - parameter generator: The Function to generate element. 
    - parameter count: The number of times to repeat the value passed in the repeatingFunc parameter. 
    */
   init(repeatingFunc generator: () -> Element, count: Int) {
        self.init()
        for _ in 0..<count {
            self.append(generator())
        }
    }
}

// Example of use

import Foundation
func genInteger() -> Int {
    return Int(arc4random()) % 100
}

let arr = Array(repeatingFunc: genInteger, count: 5)
print(arr)