cannot assign value of type '[(string, string)]' to type '[string : string]'

Question

I've declared this dictionary:

var arrayFrasi:[String:String] = [:]

Then in the viewDidLoad I retrive the data from my db and then I sort the dictionary using this code:

let df = NSDateFormatter()
        df.dateFormat = "dd-MM-yyyy"

        let myArrayOfTuples = self.arrayFrasi.sort{ df.dateFromString($0.0)!.compare(df.dateFromString($1.0)!) == .OrderedAscending}

But I need to use the initial dictionary (arrayFrasi), when I do this:

self.arrayFrasi = myArrayOfTuples

I've got this error:

cannot assign value of type '[(string, string)]' to type '[string : string]'

I can't figure out why. Thank you very much!

Answer 1

That makes perfect sense. A Dictionary has no defined order, so the sort returns you an array of tuples.

Swift’s Dictionary type does not have a defined ordering. To iterate over the keys or values of a dictionary in a specific order, use the sort() method on its keys or values property.

https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/CollectionTypes.html