crossroadlabs/boilerplate

Swift boilerplate code library with tons of useful stuff, including Linux compatibility layers

boilerplate's Issues

Boilerplate's zip(_:) conflicts with Swift's zip(_:_:)

Given an extension like:

extension Dictionary {
    init<S: SequenceType where S.Generator.Element == Element> (_ seq: S) {
        self.init()
        for (k, v) in seq {
            self[k] = v
        }
    }

    func mapValues<T>(transform: Value->T) -> Dictionary<Key,T> {
        return Dictionary<Key,T>(zip(self.keys, self.values.map(transform)))
    }
}

Xcode throws a compiler error saying "extra argument in call" for the zip() function.

This was massively frustrating and I was able to work around it with the following change to my code:

func mapValues<T>(transform: Value->T) -> Dictionary<Key,T> {
        return Dictionary<Key,T>(seq: safeZip(self.keys, self.values.map(transform)))
}

// defined outside the extension
public func safeZip<Sequence1 : SequenceType, Sequence2 : SequenceType>(sequence1: Sequence1, _ sequence2: Sequence2) -> Zip2Sequence<Sequence1, Sequence2> {
    return zip(sequence1, sequence2)
}