Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Swift Collections and Control Flow Control Flow With Conditional Statements Working With Switch Statements

Nima Doost
Nima Doost
706 Points
Posted by Nima Doost
Nima Doost
706 Points

filling in empty arrays

I've been having issues trying to finalize my code, I know I;m on the right track but some guidance would be appreciated!! How does the final version of this look?

operators.swift 
var europeanCapitals: [String] = []
var asianCapitals: [String] = []
var otherCapitals: [String] = []

let world = [
  "BEL": "Brussels", 
  "LIE": "Vaduz", 
  "BGR": "Sofia", 
  "USA": "Washington D.C.", 
  "MEX": "Mexico City", 
  "BRA": "Brasilia", 
  "IND": "New Delhi", 
  "VNM": "Hanoi"]

for (key, value) in world {
    // Enter your code below

    // End code
}

1 Answer

William Humphrey
William Humphrey
5,543 Points
William Humphrey
William Humphrey
5,543 Points 
 // first you need to "switch" on the key
 switch (key) {
        // in a switch statement you need to add cases for the keys and place them in the correct array
    case "BEL", "LIE", "BGR": europeanCapitals.append(value)
        //because you are making a change to the array you need to use the .append method and throw the value on the back end
    case "IND", "VNM": asianCapitals.append(value)
        // because switch statements are exhaustive you need to have a default where everything else can go
    default: otherCapitals.append(value)
    }

// End code

}