arrays - 如何使用条件过滤自定义对象数组

Question

我有项目类

 class Item {
        var id:Int
        var name:String
        var value:Int
        var isDefault:Bool
    }

在 Class Item 的基础上，我有 2 个 [Item] 类数组，如果 id 匹配，我想将这个数组与第一个数组中的对象替换为第二个数组，并且应该附加(第一个/第二个)中的所有剩余数组

let fisrt = Item(id: 1, name: "A", value: 3, isDefault:false)
let second = Item(id: 2, name: "B", value:5,isDefault:false)
let third = Item(id: 3, name: "c", value:5,isDefault:false)

var fisrtArray = [fisrt, second, third]

let fisrt2 = Item(id: 4, name: "P", value: 13, isDefault:true)
let second2 = Item(id: 2, name: "Q", value:15, isDefault:true)
let third2 = Item(id: 7, name: "R", value:15,  isDefault:true)
let forth2 = Item(id: 8, name: "S", value:18,  isDefault:true)

var secondArray = [fisrt2, second2, third2,forth2] 

所以我的结果数组应该是

Item(id: 1, name: "A", value: 3, isDefault:false)
Item(id: 2, name: "Q", value:5,isDefault:true)
Item(id: 3, name: "c", value:5,isDefault:false)
Item(id: 4, name: "P", value: 13, isDefault:true)
Item(id: 7, name: "R", value:15,  isDefault:true)
Item(id: 8, name: "S", value:18,  isDefault:true)

Note: size of array may be any thing either firstArray is large or Second its not dependent. I do it with for loop but i think there other way of doing it

Answer 1

let result = secondArray
result.append(contentsOf: fisrtArray.filter { item in
    !secondArray.contains(where: { $0.id == item.id })
})

之后你可以按id对result进行排序