tdubs42

class Node {
  constructor(data) {
    this.data = data;
    this.next = null;
    this.previous = null;
  }

  setNextNode(node) {
    if (node instanceof Node || node === null) {
      this.next = node;

tdubs42

# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# http://wiki.nginx.org/Pitfalls
# http://wiki.nginx.org/QuickStart
# http://wiki.nginx.org/Configuration
#
# Generally, you will want to move this file somewhere, and start with a clean
# file but keep this around for reference. Or just disable in sites-enabled.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.

tdubs42

// From Frontend Masters Typescript Fundamentals v3 course

// Array.prototype.map, but for Dict
function mapDict<T, U>(
  input: Dict<T>,
  mappingCb: (arg: T, key: string) => U
): Dict<U> {
  const output: Dict<U> = {}

  // for-of loop is for an iterable

tdubs42

const isAnagram = (s, t) => {
  if (s.split('').sort().join('') == t.split('').sort().join('')) {
    return true
  }
  
  return false
};

tdubs42

const twoSum = (nums, target) => {
  // given an array, return pair of indices corresponding to numbers in array that equal target
  // there is exactly 1 solution per array of nums
  
  // need variable to store indices of solution
  const solution = []

  // need variable to store count to leverage while loop
  let count = 0
  

tdubs42

const numIslands = grid => {
  // need variable to count islands
  let islands = 0
  
  // create a function to search for 1 and use recursion to search surrounding cells
  const findIslands = (row, col, grid) => {
    // first check if row and col exist on grid and if grid[row][col] 0
    if (
      row < 0 || 
      col < 0 || 

tdubs42

/* 
  This challenge is slightly misleading, as it says to reverse a string but inputs an array and expects an 
  array as output. If you need to return this as a string, use the String.join() method
*/
const reverseString = s => {
  const reverseArray = s.reverse()
    
  return reverseArray
};

tdubs42

knex
  .select([
    'users.*',
    knex.raw('json_agg("posts") as posts')
  ])
  .from('users')
  .leftJoin(function () {
    this.select(['posts.*', knex.raw('json_agg("comments") as comments')])
      .from('posts')
      .leftJoin('comments', { 'posts.id': 'comments.post' })

tdubs42

"scripts": {
    "start": "node index.js",
    "server": "nodemon index.js",
    "migrate": "knex migrate:latest",
    "rollback": "knex migrate:rollback",
    "seed": "knex seed:run",
    "test": "cross-env NODE_ENV=test jest --runInBand --verbose --watch --setTimeout=500"
},

tdubs42

// always use as first seed file to clean db
const cleaner = require('knex-cleaner')

exports.seed = function (knex) {
  return cleaner.clean(knex, {
    mode: 'truncate', // resets ids
    ignoreTables: [
      'knex_migrations',
      'knex_migrations_lock'
    ],