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Misho Milicevic
5,597 PointsAdding multiple keys to a single Dictionary parameter? Not sure I understand the extra credit assignment
In Swift Functions and Optionals, under Parameters and Tuples, the extra credit assignment states:
Write a function that accepts a Dictionary as parameter and returns a named tuple. The dictionary should contain the following keys: title, artist and album.
How do I assign all three keys to a single Dictionary parameter? Or am I getting the gist of what the assignment is even asking?
func songs(??: Dictionary) -> (?,?) {}
that is one of many different variations I've tried, including trying to use <> because they showed up with autocomplete. Meanwhile I didn't find the developer library particularly helpful in finding an answer.
Please help!
2 Answers
Michael Liendo
15,326 PointsWithout outright giving you the direct answer, the Apple Docs actually have a pretty good guide that would help. Let me know if you need another clue/the answer. Sometimes it's better to just learn from the answer instead of banging your head on the keyboard!
Here's the link: https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/CollectionTypes.html
Marie Thomasson
1,103 PointsI had the same problem, and also found the developer website uninformative.
I went back to the dictionary videos to see if i could unravel this, and realized that I didn't complete one of the extra credit problems, which is the first step in this extra credit!
Try going back to dictionaries and arrays, and solve that first. Even for that, I needed help!
I did a search, and found an answer on stack exchange. Reading very carefully, I realized that what we want is an array of dictionaries, and not a dictionary of dictionaries. adding multiple key value pairs ends up being straightforward. Just add a comma and add another pair!!
try this link if you're still having trouble! http://stackoverflow.com/questions/27045887/swift-add-multiple-key-value-objects-to-nsdictionary
Misho Milicevic
5,597 PointsMisho Milicevic
5,597 PointsYes I've looked at that page before and it wasn't helping much. I understand the basics of creating a dictionary but am feeling unsure as to how they are used as parameters in a function. Which I don't see that anywhere on that Docs page. Basically, I'm still confused. Some things I've tried that don't seem to work.
func song(#title: String, #artist: String, #album: String) {}
func song(Dictionary) -> (#title: String, #artist: String, #album: String) {}
func song(#songs: Dictionary) -> (#title: String, #artist: String, #album: String) { var songsDic = [] }
... I don't know. I'm getting more lost the more I think about it. So yes I'd appreciate the answer. I'll learn much faster that way by picking apart the way it actually works.