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

Enrique González-Roulet
Enrique González-Roulet
539 Points
Posted by Enrique González-Roulet
Enrique González-Roulet
539 Points

Im stuck with this exercise! anyone can help me, please! :)

i don't known how to added the results in any case to the array

operators.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 world in worlds {
    switch world{
    case "BEL", "LIE", "BGR": europeanCapitals.append["Brussels","Vaduz", "Sofia"]
    case "USA","MEX", "BRA": otherCapitals["Washington D.C","Mexico City","Brasilia"]
    case "IND","VNM": asianCapitals["New Dheli","Hanoi"]
    default: print("thre is no capital")
    }
}

2 Answers

Matthew Long
Matthew Long
28,407 Points
Matthew Long
Matthew Long
28,407 Points

You're off to a decent start, but you need a way to access the key and value in the dictionary. Currently your for in loop and switch statement are setup incorrect. You will iterate over every key value pair in the world dictionary. Your switch statement will look at every key and append that value, when it matches, to the corresponding capitals array.

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 {
    switch key {
    case "BEL","LIE","BGR": europeanCapitals.append(value)
    case "IND","VNM": asianCapitals.append(value)
    default:otherCapitals.append(value)
    }
}
Enrique González-Roulet
Enrique González-Roulet
539 Points
Enrique González-Roulet
Enrique González-Roulet
539 Points

thank you very much, Matthew !! I was with my head melted already ... thanks for your answer !! really!! :)