swift – 比较字典,同时排除某些键

我有2个词典：

let foo: [String: Any] = ["name": "John","isHuman": true,"age": 20]
let bar: [String: Any] = ["name": "Ann","age": 34]

我想在比较中排除某些键时进行比较.我要排除的键位于另一个字典中：

let car: [String: Any] = ["age": 20]

我有这个扩展名：

extension Dictionary where Key: Equatable {
    func isEqualTo(_ dictionary: Dictionary,excluding: [Key] = []) -> Bool {
      let left = filter({ !excluding.contains($0.key) })
      let right = dictionary.filter({ !excluding.contains($0.key) })
      return NSDictionary(dictionary: left).isEqual(to: right)
    }
}

但是当我调用它时,我需要将排除的键包装在Array中,否则编译器将失败：

Cannot convert value of type ‘Dictionary.Keys’ to expected argument type ‘[String]’

foo.isEqualTo(bar,不包括：Array(car.keys))有效.

foo.isEqualTo(bar,不包括：car.keys)导致编译器错误.

我可以调整扩展程序,以避免将排除的键包装在数组中吗？

解决方法

car.keys的类型为Dictionary< Key,Value> .Keys,它是一个
集合而不是数组.

如果将函数声明为

func isEqualTo<C: Collection>(_ dictionary: Dictionary,excluding: C) -> Bool
        where C.Element == Key

然后两个

foo.isEqualTo(bar,excluding: Array(car.keys))
foo.isEqualTo(bar,excluding: car.keys)

编译和工作.