javascript set method object code example

Example 1: javascript class getter setter

// *** JS Class GETTER / SETTER (+split)

	class Person {
        constructor(firstname, lastname) {
            this.firstname = firstname;
            this.lastname = lastname;
        }
        // getters => access properties
        // setters => change or mutate them
        get fullName() {
            return `Hello ${this.firstname} ${this.lastname}`;
        }
        set fullName(space) {
            const parts = space.split(' ');
            this.firstname = parts[0];
            this.lastname = parts[1];
        }
    }
    let run = document.getElementById("run");
    run.addEventListener('click', () => {
        let john = new Person('John', 'Connor');
        console.log(john.fullName);
        john.fullName = 'Billy Butcher';
        console.log(john.firstname + ' ' + john.lastname);
      	//console.log(`${john.firstname} ${john.lastname}`); same output
      // => has to be john.firstname otherwise undefined 
    }) 
// output => Hello John Connor | Billy Butcher

Example 2: set js

// Use to remove duplicate elements from the array 

const numbers = [2,3,4,4,2,3,3,4,4,5,5,6,6,7,5,32,3,4,5]

//spreading numbers of the object into an array using the new operator
console.log([...new Set(numbers)]) 

// [2, 3, 4, 5, 6, 7, 32]