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

Su Deng
Su Deng
1,226 Points
Posted by Su Deng
Su Deng
1,226 Points

how to append the values in a dictionary

i dont know how to start the switch statement nor do i know how to append the values in a dictionary to the array at the start

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 (key, value) in world {
    // Enter your code below
    switch world[key] {
    case "BEL", "LIE", "BGR": europeanCapitals.append(world[value])
    case "IND", "VNM": asianCapitals.append(world[value])
    default: otherCapitals.append(world[value])
    // End code
}

1 Answer

Jeff McDivitt
Jeff McDivitt
23,970 Points
Jeff McDivitt
Jeff McDivitt
23,970 Points

Hi Su -

You need to start the switch statement by switching on the key in the dictionary. You then append using the normal append syntax

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","BGR","LIE":
        europeanCapitals.append(value)
    case "IND" :
        asianCapitals.append(value)
    default:
        otherCapitals.append(value)
    }
}