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iOS Error Handling in Swift 2.0 Error Handling Handling Errors

boris said
boris said
3,607 Points
Posted by boris said
boris said
3,607 Points

Having trouble with 2nd part of code challenge. It won't accept my do and catch code. Please help

Here is my code:

do {

let things = try Parser.parse()

}

catch {

print("Error")

}

2 Answers

David Lin
David Lin
35,864 Points
David Lin
David Lin
35,864 Points

You shouldn't assign the result of parse to a constant, since parse doesn't return anything.

enum ParserError: ErrorType {
  case EmptyDictionary
  case InvalidKey
}

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

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

let data: [String : String?]? = ["someKey": nil]
let parser = Parser(data: data)

do {
  try parser.parse()
} catch {
   print ("error")
}
boris said
boris said
3,607 Points
boris said
boris said
3,607 Points

Thanks for your feedback, It really helped.

David Lin
David Lin
35,864 Points
David Lin
David Lin
35,864 Points

you're welcome!