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Mitchell 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 It is a bit outdated with Swift 2, but helped me figure it out, thank you!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)