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iOS Error Handling in Swift 2.0 Error Handling Handling Errors

Posted by Nicholas Laughter
Nicholas Laughter
2,136 Points

Not understanding what it's asking.

I got this far, but I can't figure out what it's asking of me now.

error.swift 
enum ParserError: ErrorType {
  case EmptyDictionary
  case InvalidKey
}

struct Parser {
  var data: [String : String?]?

  func parse() throws {
        guard let parsedData = data else {
            throw ParserError.EmptyDictionary
        }
        guard parsedData.keys.contains("someKey") else {
            throw ParserError.InvalidKey
        }
  }
}

let data: [String : String?]? = ["someKey": nil]
let parser = Parser(data: data)
do {
    let parser = try Parser(data: data)
   try parser.parse()
} catch ParserError.EmptyDictionary {
}

1 Answer

Nathan Tallack
Nathan Tallack
22,159 Points
Nathan Tallack
Nathan Tallack
22,159 Points

Great work!!! You almost had it!!!

Just remove that try on your let parser = statement and add the second catch clause (they wanted both for the challenge) and you got it nailed!!!

Keep up the great work!!!

let data: [String : String?]? = ["someKey": nil]
let parser = Parser(data: data)
do {
    let parser = Parser(data: data)
    try parser.parse()
    } catch ParserError.EmptyDictionary {
        print("Error: Empty Dictionary!")
    } catch ParserError.InvalidKey {
        print("Error: Invalid key")
}
Nicholas Laughter
Nicholas Laughter
2,136 Points

Oh I get it! Man, hopefully it'll come to me soon! Thanks for the help!