ObsidianCat

// Node definition
function TreeNode(val) {
     this.val = val;
     this.left = this.right = null;
}

// Assemle a tree
const left = new TreeNode(2)
const right = new TreeNode(2)
const rightRight = new TreeNode(3)

ObsidianCat

/**
 * @param {string} s
 * @return {number}
 */
var romanToInt = function(s) {
  let result = 0
  const conversion = {
    "I": 1,
    "V": 5,
    "X": 10,

ObsidianCat

// Can be used as foundation for algo questions which ask to split number into digits and manipulate it in some way afterward
function numberToSumOfDigits(num) {
  let totalSum = 0;
  while(num > 0){
    const digit = num %10
    num = Math.floor(num/10);
    totalSum += digit
  }

  return totalSum

ObsidianCat

function ListNode(val){
  this.val = val;
  this.next = null;
}

function createList(arr){
  let result = arr.map((item, index, arr)=>{
    const node = new ListNode(item)
    return node
  })

ObsidianCat

{
  "sub": "00un7nfq2aTE0HOAl356",
  "name": "Lula Leus",
  "locale": "en-US",
  "email": "example@example.com",
  "preferred_username": "lulaleus",
  "given_name": "Lula",
  "family_name": "Leus",
  "zoneinfo": "America/Los_Angeles",
  "updated_at": 1559047283,

ObsidianCat

// ./cypress/integration/recipes-page.test.js

describe('Recipes page', () => {
  before(() => {
    cy.loadRecipesPage();
    // Save selector as shortcuts, usefull if they will be used repetitively 
    cy.get('[data-cy=recipes-vegan-toggle] input').as('toggle');
    cy.get('[data-cy=recipes-vegan-toggle] label').as('toggleLabel');

    cy.get('[data-cy=recipe-card]').as('recipeCards');

ObsidianCat

// ./cypress/support/commands.js

Cypress.Commands.add('loadRecipesPage', () => {
  // One command can call another, just like plain functions
  cy.mockOktaLoggedState();

  // When UI requests recipes, Cypress, not the actual server, will return response
  cy.route('GET', '/api/recipes', 'fixture:recipes.json').as('recipes');

  // I can do manipulation on a fixture before serving it

ObsidianCat

// ./cypress/support/commands.js

Cypress.Commands.add('mockOktaLoggedState', () => {
  // Set cookies
  cy.setCookie('okta-oauth-nonce', 'value of this cookie copied from the browser');
  cy.setCookie('okta-oauth-state', 'value of this cookie copied from the browser');

  // To avoid token expiration, we create a new timestamp every time
  const oneDayFromNow = Date.now() + 1000 * 60 * 60 * 24;
  

ObsidianCat

import React from 'react';
import { mount } from 'enzyme';
import ParentComponent from './ParentComponent';
import ChildComponent from './ChildComponent';

describe('Parent component', () => {
  it('adds and removes child component from the DOM', async () => {
    const wrapper = mount(<ParentComponent />);
    
    //Find button in Parent component

ObsidianCat

// Object destructuring

//Object
const response = {
  status: 200,
  data: {
    user: {
      name: 'Rachel',
      title: 'Editor in Chief'
    },