package main

import (
    "fmt"
    "log"
    "errors"
    )

type Person struct {
	Name    string `json:"name"`
	Age     int `json:"age"`
}


func maxAge(personList []Person) (Person, error) {
    var pMax Person
    if len(personList) == 0 {
        return pMax, errors.New("empty list")
    }
    for _, p := range personList {
        println(p.Name, p.Age)
        if p.Age > pMax.Age {
            pMax = p
        }
    }
    return pMax, nil
}


func main() {
    personList := []Person{
        {Name: "Oliver", Age: 27},
        {Name: "James", Age: 23},
        {Name: "Jack", Age: 17},
        {Name: "John", Age: 27},
        {Name: "Harry", Age: 16},
        {Name: "Robert", Age: 18},
        {Name: "Jacob", Age: 38},
        {Name: "Micheal", Age: 42},
        {Name: "Frank", Age: 19},
    }
    p, err := maxAge(personList)
    if err != nil {
        log.Fatal("Error ", err)
    }
    fmt.Println("Il più anziano è", p.Name, "con", p.Age, "anni")
}