suhailgupta03

let employee = {
    name: 'John',
    age: 30,
    salary: 1000
}

const {name, ...others} = employee;
// ...others means that all the other
//  properties of the object will be 
// stored in the others variable

suhailgupta03

let employee = {
    name: 'John',
    age: 30,
    salary: 1000
}

let {salary, name} = employee;
// this is an example of destructuring 
// assignment. We call this as destructuring
// because we are destructuring the object

suhailgupta03

let arr = [1,2,3,4];

// console.log(arr[0]); // 1
// console.log(arr[1]); // 2
// console.log(arr[2]); // 3

const [f, s] = arr;
// the above concept is called 
// destructuring because we are
// destructuring the array into

suhailgupta03

let arr1 = [
    1,2,3
]
let arr2 = [
    4,5,6
]

let negativeNumbers = [
    -1,-2,-3
]

suhailgupta03

let student = {
    name: 'Mike',
    age: 23,
    city: 'Paris'
}
let studentParentDetails = {
    fatherName: 'John',
    motherName: 'Jane'
}
// To merge two objects, we can use the spread operator

suhailgupta03

// ES6 using arrow functions
let myFunctionVersion2 = (a, b) => 100
/**
 * Another way of writing the same function is
 * let myFunctionVersion2 = (a, b) => {
 *  return 100
 * }
 * 
 * In ES5:
 * function myFunctionVersion2(a, b) {

suhailgupta03

// ES6
// ES6 means ECMAScript 6, which is the latest version of JavaScript.
// ECMAScript is the organization that sets the standards for JavaScript.
// The version before ES6 was ES5.
// ES5
let myFunction = function (a, b) {
    return a * b;
}
console.log(myFunction(2, 3)); // 6 
// ES6 using arrow functions

suhailgupta03

// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort

// let arr = [3, 56, -1, 0, -45, 899, 78]
let arr = ["oranges", "apples", "aaples", "bananas"];
let sorted = arr.sort(); 
// sort function sorts the array in lexographical order
// which means it will sort the array as if it is a string
// so the output will be [-1, -45, 0, 3, 56, 78, 899]
// because -1 comes before -45, 0 comes before 3, etc.

suhailgupta03

function sum(a, b) {
    return a + b;
}

function subtract(a, b) {
    return a - b;
}

function sin(theta) {
    return Math.sin(theta);

suhailgupta03

function sum(a, b) {
    return a + b;
}

function printSum() {
    return sum;
} // printSum is now a higher-order function
// because it returns a function as a result

// printSum() will return a function sum and then you