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![Alex Luo](https://secure.gravatar.com/avatar/9b2720b98585ea0d900bf12d781d4d92?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Alex Luo
825 PointsProblems with "Working with Swift Statements"
I'm getting the following error message with this code:
Playground execution failed:
error: CollectionsAndControlFlows.playground:124:10: error: expression pattern of type 'String' cannot match values of type 'Dictionary<String, String>.Keys' case "BEL","LIE","BGR": europeanCapitals.append(value) ^~~~~
Code:
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 switch world { case "BEL","LIE","BGR": europeanCapitals.append(value) case "IND","VNM": asianCapitals.append(value) case "USA","MEX","BRA": otherCapitals.append(value) default:otherCapitals.append(value) } // End code }
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
![Tom Makedonski](https://secure.gravatar.com/avatar/e7b544a22d05defcf7431b46959f130c?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Tom Makedonski
439 PointsYour problem is that you can't switch on "word" (which is a dictionary). You have to switch on "key"(which is of type string):
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
switch key {
case "BEL","LIE","BGR": europeanCapitals.append(value)
case "IND","VNM": asianCapitals.append(value)
case "USA","MEX","BRA": otherCapitals.append(value)
default:otherCapitals.append(value) }
// End code
}
europeanCapitals.forEach({print($0)})
print("\n")
asianCapitals.forEach({print($0)})
print("\n")
otherCapitals.forEach({print($0)})
print("\n")