[Array+removeRandom] #extension #iOS

Array+removeRandom.swift

//
//  Array+removeRandom.swift
//
//  Created by Jay Lee on 31/01/2019.
//  Copyright © 2019 Jay Lee <jaeho.lee@snu.ac.kr>
//  This work is free. You can redistribute it and/or modify it under the
//  terms of the Do What The Fuck You Want To Public License, Version 2,
//  as published by Sam Hocevar. See http://www.wtfpl.net/ for more details.
//

import Foundation

extension Array {
  mutating func removeRandom() -> Element? {
    if count > 0 {
      let randomIndex = Int.random(in: 0 ..< count)
      return remove(at: randomIndex)
    } else {
      return nil
    }
  }
}