SwiftyJSON utility extension

protocol JSONInitable {
    init(data: JSON)
}

extension JSON {
    func to<T where T: JSONInitable>(type: T.Type) -> [T] {
        return self.arrayValue.map {
            return T(data: $0)
        }
    }
  }
  
  //example
  
  struct A:JSONInitable {
    let a: String
    let b: String
    
    init(data: JSON) {
      a = data["a"].stringValue
      b = data["b"].stringValue
    }
  }
  
  let data = JSON(["a": "A", "b": "B"])
  let result = data.to(A)