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Start your free trialMitchell Richmond
5,401 PointsStruggling with Error Checking
Can't figure out how to handle the dictionary with two optionals, anybody have the answer for this exercise?
Thank you!
enum ParserError: Error {
case emptyDictionary
case invalidKey
}
struct Parser {
var data: [String : String?]?
func parse() throws {
}
}
let data: [String : String?]? = ["someKey": nil]
let parser = Parser(data: data)
2 Answers
Mitchell Richmond
5,401 Pointsenum ParserError: Error { case emptyDictionary case invalidKey }
struct Parser { var data: [String : String?]?
func parse() throws {
guard let parserData = data else {
throw ParserError.emptyDictionary
}
guard let keysArray = data?["someKey"] else {
throw ParserError.invalidKey
}
} }
let data: [String : String?]? = ["someKey": nil] let parser = Parser(data: data)
tromben98
13,273 PointsTake a look at this: https://teamtreehouse.com/community/error-handling-2
Mitchell Richmond
5,401 PointsAwesome thanks. It is a bit outdated with Swift 2, but helped me figure it out, thank you! Here is my final solution that ended up working:
enum ParserError: Error { case emptyDictionary case invalidKey }
struct Parser { var data: [String : String?]?
func parse() throws {
guard let parserData = data else {
throw ParserError.emptyDictionary
}
guard let keysArray = data?["someKey"] else {
throw ParserError.invalidKey
}
}
}
let data: [String : String?]? = ["someKey": nil] let parser = Parser(data: data)