I am making a struct called personStruct , which takes simple data like age and name . Here is this struct:
struct personStruct
{
var name: String = String()
var age: Int = Int()
}
then I am using this down class for extracting my wished arrays:
class PersonModel
{
var persones: [personStruct] = [personStruct]()
var countOfPersones: Int { persones.count }
func personesAgeArray() -> [Int]
{
var returnArray: [Int] = [Int]()
for item in persones { returnArray.append(item.age) }
return returnArray
}
func personesNameArray() -> [String]
{
var returnArray: [String] = [String]()
for item in persones { returnArray.append(item.name) }
return returnArray
}
}
And this is my use case of those struct and class:
let personModel: PersonModel = PersonModel()
personModel.persones = [personStruct(name: "bob", age: 30), personStruct(name: "Roz", age: 26), personStruct(name: "man", age: 40)]
print(personModel.personesAgeArray())
print(personModel.personesNameArray())
So as you see that class make that Job done!
My Goal: Do we have a real syntax or more efficiency way for making those Arrays? (I mean personesAgeArray and personesNameArray )
My Super Goal: I want personesAgeArray and personesNameArray get automatically builded/updated with adding new item to persones .
struct Person {
let name: String
let age: Int
}
class Model {
var people: [Person] = []
var peopleCount: Int { people.count }
var ages: [Int] { people.map(\.age) }
var names: [String] { people.map(\.name) }
}
let model: Model = .init()
model.people = [.init(name: "bob", age: 30), .init(name: "Roz", age: 26), .init(name: "man", age: 40)]
print(model.ages) // "[30, 26, 40]\n"
print(model.names) // "["bob", "Roz", "man"]\n"
model.people.append(.init(name: "Omid", age: 20))
print(model.ages) // "[30, 26, 40, 20]\n"
print(model.names) // "["bob", "Roz", "man", "Omid"]\n"
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.