gistfile1.txt

func forAllCombinations<T>(r1 : Range<T>, r2 : Range<T>, body : (T, T) -> ()) {
    for i in r1 {
        for j in r2 {
            body(i, j)
        }
    }
}

 forAllCombinations(0..3, 0..5) {
     (i, j) in
     println("\(i) \(j)")
 }
 
 or 
 
 forAllCombinations(0..3, 0..5) {
     println("\($0) \($1)")
 }

Sweet