Dictionary as function return type

Question

I'm following a RW tutorial to learn about Swift and I'm getting errors at the first line of the following function declaration:

func returnPossibleTips() -> [Int: Double] {
    let possibleTipsInferred = [0.15, 0.18, 0.20]
    let possibleTipsExplicit:[Double] = [0.15, 0.18, 0.20]

    var retval = [Int: Double]()
    for possibleTip in possibleTipsInferred {
        let intPct = Int(possibleTip*100)
        retval[intPct] = calcTipWithTipPct(possibleTip)
    }
    return retval
}

These are the errors:

• Expected type for function result
• Consecutive declarations on a line must be separated by ';'
• Expected declaration
• Expected '{' in body of function declaration

Answer 1

It's looks like you are not using last version of Swift (beta 5), in first versions there was no [Int] syntax for arrays.

you can update Xcode or rewrite this code:

func returnPossibleTips() -> Dictionary<Int, Double> {
    let possibleTipsInferred = [0.15, 0.18, 0.20]
    let possibleTipsExplicit:Array<Double> = [0.15, 0.18, 0.20]

    var retval = Dictionary<Int, Double>()
    for possibleTip in possibleTipsInferred {
        let intPct = Int(possibleTip * 100)
        retval[intPct] = calcTipWithTipPct(possibleTip)
    }

    return retval
}