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

Posted by mattcleary2
mattcleary2
19,953 Points

Labor intensive?

Hey guys,

Took me a while to get this to work, but it feels like too much work. I'm assuming there's a way to append each capital to the respective array without having to write them out individually?

this is what i did:

swift. 2.0


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("Brussels")
    case "LIE": europeanCapitals.append("Vaduz")
    case "BGR": europeanCapitals.append("Sofia")
    case "IND": asianCapitals.append("New Delhi")
    case "VNM": asianCapitals.append("Hanoi")
    case "USA": otherCapitals.append("Washington D.C.")
    case "MEX": otherCapitals.append("Mexico City")
    default: otherCapitals.append("Brasilia")   
        }  
        // End code
}

Thank you!

2 Answers

Steven Deutsch
Steven Deutsch
21,046 Points
Steven Deutsch
Steven Deutsch
21,046 Points

Hey Matt Cleary,

You're right, there is a more efficient way of doing this. You cain chain together multiple key values for the same case of the switch statement. Also, your switch statement is inside a for loop that iterates over the dictionary and assigns each item to a tuple of (key, value). This means you can refer to the specific value for a matched key as "value" inside of your switch statement. See my code below:

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

Good Luck!

mattcleary2
mattcleary2
19,953 Points
mattcleary2
mattcleary2
19,953 Points

Thanks Steven, very helpful!