class Person {
    constructor(cpr, name, age) {
        this.cpr = cpr
        this.name = name
        this.age = age
    }

    toString(){return this.name +' - '+this.cpr + ' - ' + this.age}
    valueOf(){return this.cpr}
    equals(p){
        if(p == this){
            if(p.cpr === this.cpr){
                return true
            }
        } else {
            return false
        }
    }
}

Person.compare = function(p1,p2){
    if(p1.name < p2.name){return -1}
    if(p1.name > p2.name){return 1}
    if(p1.name == p2.name){return 0}
}

let p = new Person(1234, 'Benjamin', 22)
let p1 = new Person(1234, 'Keivn', 4567890)

console.log(p.toString())
console.log(p.valueOf())
console.log(p.equals(p))
console.log(Person.compare(p,p))