Can't find the mistake; Switch.swift

Question

Would be very glad if someone could help me with this code. Technically, I gotta append the european cities to the european array, the asian cities to the asian array and the rest to otherCapitals :)

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 key {
    case "BEL": europeanCapitals.append("Brussels");
    case "LIE": europeanCapitals.append("Liechtenstein");
    case "BGR": europeanCapitals.append("Sofia")
    case "VNM": asianCapitals.append("Hanoi")
    default: otherCapitals.append(value)
        // End code
    }
}

Answer 1 · 2016-04-25T15:30:58Z

April 25, 2016 3:30pm

Hey Elias,

You're on the right track, except the challenge wants you to use the loop and variables to do the assigning. Right now you are hard-coding the values into the array (which can be done without a loop). Imagine if you had 5000 cities... would you want to hard-code every one into an array? Nope... so we use the loop.

As each loop iteration executes, there is a value in the key variable and in the value variable. Then it moves down to the switch. Here it will check it's key value against the cases. When it finds a match, you can just append the value variable to the correct array. So, for all the values, you will only need 3 case statements.

I've posted the correct code for the loop and switch below for your reference. I hope it all makes sense.

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)
    }
}

Keep Coding!

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Eli MBS

Eli MBS

Can't find the mistake; Switch.swift

1 Answer

Jason Anders

Jason Anders

Eli MBS

Eli MBS