Swift: Get double value from 'index' in enumeration

Question

In a simple Swift enumeration like this:

for (index, value) in enumerate(array) {
        let indexValue = idx as NSNumber
        let double = indexValue.doubleValue
        .... }

is there an easier way to convert the 'index' value to a double?

Answer 1

Yes there is:

for (index, value) in enumerate(array) {
    let doubleVal = Double(index)
}

The number types in Swift generally have an init method that takes any of the other number types.