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

Christian Laugesen
Christian Laugesen
440 Points
Posted by 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

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

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.