I'm having problems with this drawRandomCard function.
It works just like it should for some time, but eventually it crashes the application.
Here is the code:
import Foundation
var cardDeck = Array<PlayingCard>()
class Deck {
func addCard(card : PlayingCard , atTop : Bool = false){
if atTop {
cardDeck.insert(card, atIndex: 0);
}else{
cardDeck += card
}
}
func drawRandomCard() -> PlayingCard{
var card = PlayingCard()
var randomNumber : Int = Int(arc4random()) % (cardDeck.count - 1)
card = cardDeck[randomNumber]
cardDeck.removeAtIndex(randomNumber)
return card
}
}
Use arc4random_uniform
to avoid modulo bias. Like following:
let randomNumber = arc4random_uniform(150)
For your example, it will be:
let randomNumber = Int(arc4random_uniform(UInt32(cardDeck.count)))
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