how to check if a property value exists in array of objects in swift

Question

I am trying to check if a specific item (value of a property) exists in a array of objects, but could not find out any solution. Please let me know, what i am missing here.

        class Name {             var id : Int             var name : String             init(id:Int, name:String){                 self.id = id                 self.name = name             }         }          var objarray = [Name]()         objarray.append(Name(id: 1, name: "Nuibb"))         objarray.append(Name(id: 2, name: "Smith"))         objarray.append(Name(id: 3, name: "Pollock"))         objarray.append(Name(id: 4, name: "James"))         objarray.append(Name(id: 5, name: "Farni"))         objarray.append(Name(id: 6, name: "Kuni"))          if contains(objarray["id"], 1) {             println("1 exists in the array")         }else{             println("1 does not exists in the array")         } 

Answer 1

You can filter the array like this:

let results = objarray.filter { $0.id == 1 } 

that will return an array of elements matching the condition specified in the closure - in the above case, it will return an array containing all elements having the id property equal to 1.

Since you need a boolean result, just do a check like:

let exists = results.isEmpty == false 

exists will be true if the filtered array has at least one element

Answer 2

In Swift 3:

if objarray.contains(where: { name in name.id == 1 }) {     print("1 exists in the array") } else {     print("1 does not exists in the array") }