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Start your free trialLorenzo Vasquez
2,816 PointsSyntax for calling dictionary value in switch
Hello,
For the challenge regarding dictionaries, for-in loop, and switch, I could not figure out why the ! operator must be placed after calling the value of the dictionary (see below):
case "IND", "VNM": asianCapitals.append(world[key]!)
I did a Google search and saw similar examples of this exercise in order to finish the quiz. Was this explained in the previous videos? I must've missed it. Thanks in advanced for the answer.
Best, Lorenzo
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", "GR": europeanCapitals.append(world[key]!)
case "IND", "VNM": asianCapitals.append(world[key]!)
default: otherCapitals.append(world[key]!)
}
// End code
}
1 Answer
Dhanish Gajjar
20,185 PointsHey Lorenzo Vasquez I think you might have misunderstood the challenge. The challenge tries to be clear by mentioning "append the value (not the key!)" It means, only append the value and not the key. Hope the example below explains it well. Best of luck.
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
}