Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Posted by Juras Rabačauskas
Juras Rabačauskas
7,425 Points

Got stuck on Switch statement exercises

Hello, can anyone explain me please how this exercise is solved? Thank you very much.

Also, from earlier courses, I have encountered few problems, and would be very thankful if anyone would explain me how to solve them:

1.) Printing Dictionary Elements

var dictionary: [String: String] = [ "One": "First", "Two": "Second", "Three": "Third", ]

print(dictionary(0)) or print(dictionary[0])

In one case I get error "Cannot subscript a value of type '[String: String]' with an index of type 'Int' And in other case I get error "Cannot call value of non-function type '[String: String]'

2.) Printing for in numbers

for numbers in 1...10 { print("\numbers times 5 is equal to (numbers * 5)") }

3.) Printing for in numbers

var results: [Int] = []

for numbers in 1..<10 { print("\results times 5 is equal to (results * 5)") }

Also, can anyone explain me how that "\" thing works? Thank you very much.

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 world {
    case "BEL": europeanCapitals.append
    case 
    }
    // End code
}

1 Answer

anil rahman
anil rahman
7,786 Points
anil rahman
anil rahman
7,786 Points 
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": europeanCapitals.append(value);
      case "LIE": europeanCapitals.append(value);
      case "BGR": europeanCapitals.append(value);
      case "IND": asianCapitals.append(value);
      default: otherCapitals.append(value);
    }
    // End code
}
Juras Rabačauskas
Juras Rabačauskas
7,425 Points

Thank you!