Lära Static Functions

Methods also can be static. Let’s create compare() method with two parameters: studentA and studentB. This function will output which student has a higher GPA.


              123456789101112131415161718192021222324
            
class Student{
  name;
  age;
  static ageOfMajority = 18;
  university;
  gpa;
  constructor(name, age){
    this.name = name;
    this.age = age;
    console.log('Student created');
  }

  static compare(studentA, studentB) {
    if (studentA.gpa > studentB.gpa) { console.log('First student has higher GPA.') }
    else if (studentA.gpa < studentB.gpa) { console.log('Second student has higher GPA.') }
    else { console.log('GPAs are equal.') }
}
}

rob = new Student('Robert', 22);
rob.gpa = 3.4;
steve = new Student('Steve', 19);
steve.gpa = 2.9
Student.compare(rob, steve);

To call this method, you also have to use the name of the class, not the object:


              1
            
Student.compare(studentA, studentB);

Inside the static method, you can refer only to static class attributes, using this keyword, because non-static attributes are unique for each object, so for the whole class, they are undefined.

Note that in function compare() you refer to the non-static objects attributes studentA and studentB, but to the static class attributes Student.

Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 2

single

Fråga AI

Fråga vad du vill eller prova någon av de föreslagna frågorna för att starta vårt samtal

Methods also can be static. Let’s create compare() method with two parameters: studentA and studentB. This function will output which student has a higher GPA.


              123456789101112131415161718192021222324
            
class Student{
  name;
  age;
  static ageOfMajority = 18;
  university;
  gpa;
  constructor(name, age){
    this.name = name;
    this.age = age;
    console.log('Student created');
  }

  static compare(studentA, studentB) {
    if (studentA.gpa > studentB.gpa) { console.log('First student has higher GPA.') }
    else if (studentA.gpa < studentB.gpa) { console.log('Second student has higher GPA.') }
    else { console.log('GPAs are equal.') }
}
}

rob = new Student('Robert', 22);
rob.gpa = 3.4;
steve = new Student('Steve', 19);
steve.gpa = 2.9
Student.compare(rob, steve);

To call this method, you also have to use the name of the class, not the object:


              1
            
Student.compare(studentA, studentB);

Note that in function compare() you refer to the non-static objects attributes studentA and studentB, but to the static class attributes Student.

Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 2

single

Svep för att visa menyn

Methods also can be static. Let’s create compare() method with two parameters: studentA and studentB. This function will output which student has a higher GPA.


              123456789101112131415161718192021222324
            
class Student{
  name;
  age;
  static ageOfMajority = 18;
  university;
  gpa;
  constructor(name, age){
    this.name = name;
    this.age = age;
    console.log('Student created');
  }

  static compare(studentA, studentB) {
    if (studentA.gpa > studentB.gpa) { console.log('First student has higher GPA.') }
    else if (studentA.gpa < studentB.gpa) { console.log('Second student has higher GPA.') }
    else { console.log('GPAs are equal.') }
}
}

rob = new Student('Robert', 22);
rob.gpa = 3.4;
steve = new Student('Steve', 19);
steve.gpa = 2.9
Student.compare(rob, steve);

To call this method, you also have to use the name of the class, not the object:


              1
            
Student.compare(studentA, studentB);

Note that in function compare() you refer to the non-static objects attributes studentA and studentB, but to the static class attributes Student.

Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan

Var allt tydligt?

Tack för dina kommentarer!

Static Functions

Awesome!

Static Functions

Awesome!

Static Functions