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

Alex Nelsen
PLUS
Alex Nelsen
Courses Plus Student 2,977 Points
Posted by Alex Nelsen
Alex Nelsen
Courses Plus Student 2,977 Points

How do you use switch in a dictionary?

Ok so I am not having trouble with syntax, I am completely lost in using a dictionary key:value to iterate into and array. Any help would be appreciated.

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
    var capitals = value []
    switch capitals {
    case "BEL", "LIE", "BGR" : europeanCapitals.append [world] 
    default: "Nope"
    }
    // End code
}

1 Answer

patrickgardner
patrickgardner
7,395 Points
patrickgardner
patrickgardner
7,395 Points

Hi Alex,

You can use the key and value without creating a separate array in the loop. Try something like this:

for (key, value) in world {
    // Enter your code below
    switch key {
    case "BEL", "LIE", "BGR" : europeanCapitals.append(value) 
    default: "Nope"
    }
    // End code
}

edit: The challenge asks for the Asian and other capital arrays to be populated too - you can just add those with another case. Hope this helps!