Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Swift 2.0 Collections and Control Flow Control Flow With Conditional Statements Working with Switch Statements

Christian Laugesen
Christian Laugesen
440 Points

Using Switch

Hi there

I am struggling a bit solving one of the tasks.

How do I append the value to europeanCapitals, asainCapatials etc.?

Thanks a lot in advance for your help.

Kr, Christian

switch.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
    for country in world {
      switch country {
        case "BEL", "LIE", "BGR": = europeanCapitals
        case "IND", "VNM": = asianCapitals
        default: = otherCapitals
        }
      }


    // End code
}

1 Answer

Close. But you are trying to assign arrays to switch cases, which is a definite no go. You probably meant to do something like this:

for (key, value) in world {
    // Enter your code below
    switch key {
    case "BEL","LIE","BGR": 
        europeanCapitals += [value]
    case "IND", "VNM": 
        asianCapitals.append(value)
    default: 
        otherCapitals.append(value)
    }
}

where each value in world is added to the appropriate array. There are two ways to do that; +=[value] or .append(value). The editor will take either or both, as shown above.