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

mark hengstebeck
mark hengstebeck
1,119 Points
Posted by mark hengstebeck
mark hengstebeck
1,119 Points

Will someone provide me with a hint as to what I am missing in this challenge?

Working with switch statements: var europeanCapitals: [String] = ["Brussels", "Vaduz", "Sofia"] var asianCapitals: [String] = ["New Delhi", "Hanoi"] var otherCapitals: [String] = ["Washington D.C.", "Mexico City", "Brasilia"]

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 switch "VNM" { case "BEL": europeanCapitals case "LIE": europeanCapitals case "BGR": europeanCapitals case "IND": asianCapitals case "VNM": asianCapitals default: otherCapitals } }

operators.swift 
var europeanCapitals: [String] = ["Brussels", "Vaduz", "Sofia"]
var asianCapitals: [String] = ["New Delhi", "Hanoi"]
var otherCapitals: [String] = ["Washington D.C.", "Mexico City", "Brasilia"]

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
    switch "VNM" {
    case "BEL": europeanCapitals
    case "LIE": europeanCapitals 
    case "BGR": europeanCapitals 
    case "IND": asianCapitals 
    case "VNM": asianCapitals 
    default: otherCapitals 
   }
}

2 Answers

William Li
PLUS
William Li
Courses Plus Student 26,868 Points
William Li
William Li
Courses Plus Student 26,868 Points

Hi there.

The idea of the switch statement is do case comparison with the key, therefore, the value to consider is key, not "VNM". You need to change the switch line to switch key {

Secondly, the rest of your case statement look mostly ok, but you forgot to append the value to the appropriate Array. For example, for the case "BEL" here's the correct way of writing it. 

    switch key {
    case "BEL": europeanCapitals.append(value)
    ....
    ....
}

Do so for every line of the case statement and you're good to go.

mark hengstebeck
mark hengstebeck
1,119 Points
mark hengstebeck
mark hengstebeck
1,119 Points

Hi William, That's it! Thanks, Mark