Make one function accept parameters from the other-CodePudding

I have this task:

Write constructor functions that create objects representing students - they are to include first name, last name, index number, table with grades and a method that prints first name, surname and grade average. Use it to create an object that represents yourself.

So from my understanding, I need to create two constructor functions: one should be a functions accepting parameters for the grades from specific subject and calculate the average grade from a specific grade set of a specific student.

I'm trying to understand how to pas something like this

function Grade(math, compsc, sc){
    this.math = math;
    this.compcs = compsc;
    this.sc = sc;
}

Into something like this (or make it reference it, or somehow to pass the arguments of those predefined grade parameters values into this function)

function Student(index, first, last, grade) {
    this.indexNum = index;
    this.firstName = first;
    this.lastName = last;
    this.grade = grade;
    this.gradeAvg = function gradeAvg() {
        let total = 0;
        for (let value in this.grade) {
          total  = this.grade[value]
        }
        return total / Object.entries(this.grade).length;
    };
    this.outPrint = function outPrint() {
        console.log("Student number: "   JSON.stringify(this.indexNum)   "\n First name: "   this.firstName   "\n Last name: "   this.lastName   "\n Grades: \n Math:"   this.grade.math   "\n compcs:"  this.grade.compcs   "\n sc:"   this.grade.sc   "\n average grade:"  this.gradeAvg())
    }
}

Ideally, it would be something like this but a working one:

function Student(index, first, last, grade) {
    this.indexNum = index;
    this.firstName = first;
    this.lastName = last;
    grade = function(math, copcsc, sc){
        this.math = math;
        this.compsc = compcs;
        this.sc = sc;
    };
    this.gradeAvg = function gradeAvg() {
        let total = 0;
        for (let value in this.grade) {
          total  = this.grade[value]
        }
        return total / Object.entries(this.grade).length;
    };
    this.outPrint = function outPrint() {
        console.log("Student number: "   JSON.stringify(this.indexNum)   "\n First name: "   this.firstName   "\n Last name: "   this.lastName   "\n Grades: \n Math:"   this.grade.math   "\n compcs:"  this.grade.compcs   "\n sc:"   this.grade.sc   "\n average grade:"  this.gradeAvg())
    }
}

and then initialization

    const me = new Student (345345, 'jora', 'orlovskiy',{math:10, compcs: 10, sc: 5})
console.log(me.outPrint());

and with the grade

const meGr = new grade(2,2,2)

I understand that my mistake may be a stupid one with syntaxes or with understanding the basic concepts. Maybe the initialization is wrong but I tried everythingg to make it work in different ways, but nothing helped, would appreciate any help

CodePudding user response：

Use your original version of Student().

Then call new Grade() in the arguments to new Student().

const me = new Student (345345, 'jora', 'orlovskiy', new Grade(10, 10, 5));