Chapter 4, function computeBoolArray

[Taarna]

result should be var, not let.

func computeBoolArray(xs: [Int], f: Int -> Bool) -> [Bool] {
    let result: [Bool] = []
    for x in xs {
        result.append(f(x))
    }
    return result
}

[floriankugler]

Fixed in the next update... thanks!