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

walter fernandez
walter fernandez
4,992 Points
Posted by walter fernandez
walter fernandez
4,992 Points

In the editor we have a dictionary that contains a three letter country code as a key and that country's capital city as

help please

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

Marcus Klausen
Marcus Klausen
17,425 Points
Marcus Klausen
Marcus Klausen
17,425 Points

Hi Walter,

You have to switch on the key of the dictionary inside the loop, and then append the value of the key upon match. The rest of the capitals you can append to the otherCapitals array using the default statement.

For instance:

for (key, value) in world {
    switch key {
        case "KEY","KEY","KEY": europeanCapitals.append(value)
        case "KEY","KEY","KEY": asianCapitals(value)
       default:  otherCapitals.append(value)
     }
}

What you're essentially saying is:

for each key value pair in world switch on the key. In case key is equal to this or this or this string, then append to this array. If the key does not match any of my cases/strings then append to this default array instead.

Happy coding :-)