独特的对象数组

时间:2016-09-05 04:20:14

标签: swift list unique

我有一个如下所示的数组:

var persons = [Person]()

一个人包含这个:

id : Int
name : String
age : Int
gender : String

在我的人员列表中,我有多个人,但如何在唯一名称上对此列表进行排序?

我发现了这个let unique = Array(Set(originals)),但它似乎不适用于对象列表,我想保留对象的所有信息。

如果我的列表包含以下行:

Adam, Adam, John, John, Michael, Nick, Tony

我只想表明:

Adam, John, Michael, Nick Tony

我仍然希望能够让亚当斯年龄增长。

有什么想法吗?

修改
人员声明

import Foundation

public class Person : NSObject {
    var id = ""
    var name = ""
    var age = 0
    var gender = ""
}

func ==(lhs: Person, rhs: Person) -> Bool {
    return lhs.name == rhs.name
}

1 个答案:

答案 0 :(得分:2)

您需要添加此扩展程序以从人员阵列返回有序集。

extension Collection where Element: Hashable {
    var orderedSet: [Element] {
        var set: Set<Element> = []
        return reduce(into: []){ set.insert($1).inserted ? $0.append($1) : ()  }
    }
}

您还必须使您的Person类Equatable:

func ==(lhs: Person, rhs: Person) -> Bool {
    return lhs.id == rhs.id
} 

class Person: Equatable { 
    let id: String 
    let name: String 
    init(id: String, name: String) { 
        self.id = id 
        self.name = name 
    } 
}

测试

let person1 = Person(id: "1", name: "Adam") 
let person2 = Person(id: "1", name: "Adam") 
let person3 = Person(id: "2", name: "John") 
let person4 = Person(id: "2", name: "John") 
let person5 = Person(id: "3", name: "Michael") 
let person6 = Person(id: "4", name: "Nick") 
let person7 = Person(id: "5", name: "Tony") 
let people = [person1,person2,person3,person4,person5,person6,person7] 
people.orderedSet //[{id "1", name "Adam"}, {id "2", name "John"}, {id "3", name "Michael"}, {id "4", name "Nick"}, {id "5", name "Tony"}]