Sarav-S

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

Sarav-S

let add = function(a, b) {
    return a + b;
}

Sarav-S

/**
 * Marks the path as having pending changes to write to the db.
 *
 * _Very helpful when using [Mixed](./schematypes.html#mixed) types._
 *
 * ####Example:
 *
 *     doc.mixed.type = 'changed';
 *     doc.markModified('mixed.type');
 *     doc.save() // changes to mixed.type are now persisted

Sarav-S

var name = "Saravanan Sampathkumar";
function getName() {
	console.log(name);
}
getName(); // returns Saravanan Sampathkumar

Sarav-S

var name = "Saravanan Sampathkumar";

function getName() {
    var name;
    console.log(name);
    name = "Saravanan";
}

getName();

Sarav-S

var name = "Saravanan Sampathkumar";

function getName() {
    console.log(name);
    var name = "Saravanan";
}

getName();

Sarav-S

var name; // declaration

name = "Saravanan Sampathkumar"; // Initialization or Assignment

Sarav-S

const { createSelector } = require('reselect');

const cart = {
    items: [
        { name: 'Item 1', value: 200, in_stock: true },
        { name: 'Item 2', value: 100, in_stock: false },
        { name: 'Item 3', value: 200, in_stock: true },
    ]
}

Sarav-S

const cart = {
    items: [
        { name: 'Item 1', value: 200, in_stock: true },
        { name: 'Item 2', value: 100, in_stock: false },
        { name: 'Item 3', value: 200, in_stock: true },
    ]
}

// Using traditional javascript
const inStock = items => items.filter(item => item.in_stock);

Sarav-S

const cart = {
    items: [
        { name: 'Item 1', value: 200, in_stock: true },
        { name: 'Item 2', value: 100, in_stock: false },
        { name: 'Item 3', value: 200, in_stock: true },
    ]
}

// Using traditional javascript
const inStock = items => items.filter(item => item.in_stock);