RonJeffries

// Swift playground experimenting with payroll.
// (I have my reasons.)

println("Hello")

import Foundation
// This stuff sets rounding to two places after decimal

var mode = NSRoundingMode.RoundPlain

RonJeffries

// wanted a version where i could just use reduce but without building a Frame object ...
// expands rolls to include bonus values, e.g. 
    
    func testExpandRolls() {
        let game = BowlingGame()
        game.roll(5,4, 10, 5,5, 6,5)
        var expanded = game.expandRolls()
        XCTAssertEqualObjects(expanded, [5,4, 10,5,5, 5,5,6, 6,5], "expanded")
    
    }

RonJeffries

// might like this as better use of Tuple. Not sure. Return Tuple, use its named elements
// code is asking for a frame object, i think, but wanted to try Tuples

    func frameScore(index:Int) -> (score: Int, step: Int) {
        if isStrike(index) {
            return (rolls[index] + twoRolls(index+1), 1)
        } else if isSpare(index) {
            return (twoRolls(index) + rolls[index+2], 2)
        } else {
            return (twoRolls(index), 2)

RonJeffries

    func score() -> Int {
        var sum = 0
        var index = 0
        for frame in 1...10 {
            var (score, step) = frameScore(index)
            sum += score
            index += step
        }
        return sum
    }