how to update age with updateAge method parameter

Question

im trying to pass a value inside updateAge method to update object properties i cant update person1.age values it returns the same value which is 12 original property plz help me how to update using my existing method

function Person(Name, age, color){
this.Name= Name;
this.age= age;
this.color=color;

this.updateName= function(ages){
this.age = this.age + ages;
};

}
let person1 = new Person("a", 12, "white");
let person2 = new Person("b", 25, "bkack");
person1.updateName(21);
console.log(person1.age);

Answer 1

Hi daneillonge,
You are now doing a sum of the updated age and the initial age which results in 33.
Remove the 'this.age' before '+ ages' will fix the issue since it won't sum both values:

function Person(Name, age, color){
this.Name= Name;
this.age= age;
this.color=color;

this.updateName= function(ages){
this.age = ages;
};
}
let person1 = new Person("a", 12, "white");
let person2 = new Person("b", 25, "bkack");
person1.updateName(21);
console.log(person1.age); //_ 21

Additional:
U can write this in ES6 since you have more options inside constructors and classes with less code.

class Person{
constructor(name,age,color){
this.name = Name;
this.age = Age;
this.color = Color;
}

setnewAge(Age){
this.age = Age;
}
}
let person1 = new Person("a", 12, "white");
let person2 = new Person("b", 25, "bkack");
person1.updateName(21);
console.log(person1.age); //_ 21

Answer 2

thanks by the way i solve it i forget i have to assign the update age instead of adding it incrementing confusing happen in coding world hehe😊

Answer 3

i think it would look cool if we add arrow function

Answer 4

i have question what is the purpose of using function setnewAge outside constructor instead of method inside constructor is it both similar or there is code efficiency

Answer 5

daneillonge,
The class syntax is not implementing a new object-oriented model to JavaScript.
JavaScript classes provide a much simpler and clearer syntax to create objects.

In ES6 the function is called a static method of the class.

Additional you can extent a class to combine the current class with another class.
https://youtu.be/CwAU1wYeHiM

The arrow function is a anonymous function which has a shorter syntax. and it is indeed nice to use😊