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

Harry Hendel
PLUS
Harry Hendel
Courses Plus Student 2,748 Points
Posted by Harry Hendel
Harry Hendel
Courses Plus Student 2,748 Points

I am getting an error when appending data from a dictionary

I am trying to complete this challenge which is to append date from a dictionary to an array. If you could show me how to do this that would be great.

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
    switch
    // End code
}
Robert Bojor
Robert Bojor
Courses Plus Student 29,439 Points
Robert Bojor
Robert Bojor
Courses Plus Student 29,439 Points

One way to do it would be this...

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", "BGR", "LIE":
            europeanCapitals.append(value)
        case "USA", "MEX", "BRA":
            otherCapitals.append(value)
        case "IND", "VNM":
            asianCapitals.append(value)
    default:
        print("None of the above")
    }
    // End code
}

Use the switch on the key parameter and based on the fixed number of countries you have you can append the value param to the correct array.

Muratalin Appas
Muratalin Appas
1,725 Points
Muratalin Appas
Muratalin Appas
1,725 Points

You must append European countries to the europeanCapitals, same for Asian countries and you can use default case for other countries. 

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 "VNM", "IND" : asianCapitals.append(value)
    default: otherCapitals.append(value)
    }