Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialFredrick Barrett
2,068 Pointsmy do catch block is giving me errors, what am I doing wrong?
Im looking over my notes on how to create a do catch block and I can't see what im doing wrong
enum ParserError: Error {
case emptyDictionary
case invalidKey
}
struct Parser {
var data: [String : String?]?
func parse() throws {
guard let incomingData = data else { throw ParserError.emptyDictionary }
guard incomingData.keys.contains("someKey") else { throw ParserError.invalidKey }
}
do { try parse()
}
let data: [String : String?]? = ["someKey": nil]
let parser = Parser(data: data)
do {
let attempt = try parse()
}
catch ParserError {
print(invalidKey)
}
1 Answer
Johnny Nguyen
3,875 PointsYou did really good at task 1. These below are task 2 and 3. Look at the code and the task to improve your understanding. Good Luck!
Challenge task 2 of 3
do {
try parser.parse()
} catch let error {
print("\(error)")
}
Challenge task 3 of 3
do {
try parser.parse()
} catch ParserError.emptyDictionary {
print("emptyDictionary")
} catch ParserError.invalidKey {
print("invalidKey")
}