FileBackedDictionaryError

enum FileBackedDictionaryError : Error

Encapsulates a [String:T] dictionary whose values are automatically persisted (each in its own file).

Exposes methods and properties similar to those of the Swift Dictionary.

Usage examples:

Create a FileBackedDictionary instance, using Documents subdirectory named Resources and struct Resource as the value type.

      let directoryName = "Resources"
      var fbDict = FileBackedDictionary<Resource>(directoryName: directoryName)

Add resource instances

      fbDict["apples"] = Resource(name: "apples", value: 1, quantity: 1)
      fbDict["oranges"] = Resource(name: "oranges", value: 2, quantity: 2)
      fbDict["mangos"] = Resource(name: "mangos", value: 3, quantity: 3)

Look up the resource info

      let count = bDict.count // 3
      let keys = fbDict.keys  // ["apples", "oranges", "mangos"])
      let values = fbDict.values // ...
      let myOranges = fbDict["oranges"]

Remove resources

       fbDict["oranges"] = nil
       fbDict.removeAll()

At its initialization (typically at the application start), an instance of FileBackedDictionary recovers the keys and values from the file storage.