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

Posted by Nader Adam
Nader Adam
2,863 Points

what is the best solution here 

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

    // End code
}

1 Answer

Jhoan Arango
Jhoan Arango
14,575 Points
Jhoan Arango
Jhoan Arango
14,575 Points

Hello:

So you want to use a switch on the "key", this will give you in return a "value". So basically every time the for in loop goes through the keys, it will return you the correct value. In the case statements you want to let the switch know which values you want back by providing it the keys. 

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 "USA","MEX","BRA":
        otherCapitals.append(value)
    case "BEL","BGR","LIE":
        europeanCapitals.append(value)
    case "IND","VNM":
        asianCapitals.append(value)
    default: break
    }

    // End code
}

This basically says : In case the "key" is "USA" then I want its "value" to be appended to the otherCapitals array, and so on

Hope this helps you understand a bit better.

Good luck :)

Nader Adam
Nader Adam
2,863 Points

thanks