Question

我正在获取一个json数据并将其附加到一个元组，这个数组中有重复项是否有一种方法可以删除它们？这里是如何获取json数据并将其设置为tupple

 if let hru = ($0["Menu"]["title"]).string{
     let uw = ($0["name"]).string
     let tagloc = (tag: hru, location: uw)
     self.resultTuples.append(tagloc)
   }

打印这样的元组

for var i = 0; i < self.resultTuples.count; ++i{
      print(self.resultTuples[i])
 }

但打印的内容是

tag: Rice Dishes
tag: Rice Dishes
tag: Cakes and Creams
tag: Cakes and Creams
tag: Cakes and Creams
tag: Pastries and Others
tag: Pastries and Others
tag: Pastries and Others
tag: Pastries and Others
tag: Pastries and Others
tag: Pastries and Others
tag: Pastries and Others
tag: Pastries and Others
tag: Pastries and Others
tag: Pastries and Others
tag: Soups and Sauces
tag: Soups and Sauces
....

我想删除此元组中的所有重复项

编辑：

使用数组不起作用我有一个模型Menus

if let hru = ($0["Menu"]["title"]).string{

     var men = Menus(nam: hru)
      let set = NSSet(array: self.menus)
     self.menus = set.allObjects as! [Menus]
      self.menus.append(men)

    }

     for i in self.menus{
            print("MENUSS \(i.name)")

      }

Answer 1

如果使用类似结构的模型值而不是元组

struct TagAndLocation: Hashable {

    let tag: String
    let location: String

    var hashValue: Int { return tag.hashValue }
}

func ==(left:TagAndLocation, right: TagAndLocation) -> Bool {
    return left.tag == right.tag && left.location == right.location
}

您可以利用Set功能删除重复项

let results: [TagAndLocation] = ...
let uniqueResults = Array(Set(results))

请注意，在这种情况下，您将丢失原始排序顺序。

Answer 2

在使用以下函数插入之前，您可以检查特定数组中是否包含元组：

func containsTuple(arr: [(String, String)], tup:(String, String)) -> Bool {    
     let (c1, c2) = tup

     for (v1, v2) in arr {
        if v1 == c1 && v2 == c2 {
            return true
        }
     }

    return false
}

此处有更多信息How do I check if an array of tuples contains a particular one in Swift?

如何从元组中删除重复

2 个答案: