chefs.swift

// CHEFS!!!
import Darwin

var peeps = [
    "Tom",
    "Chris",
    "Connie",
    "Rob",
    "Yeti",
    "Aimi"
]

func peepPermutations() -> (String, String)[]{
    var pairs:(String, String)[] = []
    for chef in peeps {
        for souschef in peeps {
            if chef != souschef {
                pairs += (chef, souschef)
            }
        }
    }
    return pairs
}

func shuffle<T>(array: Array<T>) -> Array<T>
{
    // Implementation of Fisher-Yates shuffle 
    // http://en.wikipedia.org/wiki/Fisher-Yates_Shuffle
    for index in 0..array.count
    {
        var randIndex = Int(arc4random_uniform(UInt32(index)))
        
        // We use in-out parameters to swap the internals of the array
        swap(&array[index], &array[randIndex])
    }
    return array
}

for (chef, sous) in shuffle(peepPermutations()) {
    println("\(chef) \(sous)")
}