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this keyword

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Bilal Ahmad answered on May 22, 2021 Popularity 8/10 Helpfulness 2/10

answer this keyword

related The this(Keyword)

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this keyword

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 this keyword : 
               this represent owner that is object i.e Person which has properties like name, age etc.
this keyword in class/struct also represents owner that is object. if we made two objects of a class, then this keyword represents original object owner.

Popularity 8/10 Helpfulness 2/10 Language whatever

Source: Grepper

Tags: keyword this whatever

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Contributed on Aug 17 2022

Bilal Ahmad

0 Answers Avg Quality 2/10

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public class Person {
    String name;
    int age;
    char gender;
    public Person(String name, int age, char gender) {
        this.name = name;
        this.age = age;
        this.gender = gender;
    }
}

Popularity 9/10 Helpfulness 3/10 Language java

Source: learn.masaischool.com

Tags: java

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Contributed on May 22 2021

Weary Wildebeest

0 Answers Avg Quality 2/10

this. keyword

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//Global scope this. is window object.

//regular function call -  this. keyword is undefined. function without OWNER
const calcAge = function (birthYear) {
  console.log(this); //undefined
};
calcAge(1994);

//in Arrow functions - this. is window object because it is reaching parent function.
const calcAgeArrow = birthYear => {
  console.log(this); //window
};
calcAgeArrow(2000);

//this. keyword with method
//this. keyword inside the method is a object that is calling the method. 
//owner of the method in this case - Ioseb
const ioseb = {
  year: 1994,
  calcAge: function () {
    console.log(this); //ioseb
    console.log(2022 - this.year); //ioseb.year
  },
};
ioseb.calcAge();

const zizi = {
  year: 2000,
};

//method borrowing
//if zizi calls the method and if this. keyword is in different object 
//it is still refers to the object which is calling it. ZIZI in this case
zizi.calcAge = ioseb.calcAge;
zizi.calcAge();

//this. keyword is undefined because it is just regular function without OWNER!
//Arrow functions does not have their own this. keyword. 
//Even in the method this. is undefined
//NEVER USE ARROW FUNCTION AS A METHOD!

Popularity 8/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript keyword javasc

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Contributed on Aug 18 2022

Glamorous Goshawk

0 Answers Avg Quality 2/10

this keyword

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