primaryobjects

primaryobjects

const maxProfit = prices => {
  let left = 0;
  let right = 1;
  let maxProfit = 0;
  
  while (right < prices.length) {
    if (prices[left] < prices[right]) {
    	const profit = prices[right] - prices[left];
    	maxProfit = Math.max(maxProfit, profit);
    }

primaryobjects

class Store {
  values = [];
  indices = {};

  constructor() {
    this.values = [];
    this.indices = {};
  }
  
  add(value) {

primaryobjects

const countSumPowerTwo = arr => {
  let result = 0;
  const hash = {};
  
  // Iterate each number in the array.
  for (let i=0; i<arr.length; i++) {
    const element = arr[i];
    const powerOfTwos = [];
    
    // Increment the count for the occurrence of this element.

primaryobjects

function isAcronym(words: string[], s: string): boolean {
    let result = true;
    let offset = 0;

    for (let i=0; i<words.length; i++) {
        const word = words[i];
        const letter = word[0];

        if (s[offset++] !== letter) {
            result = false;

primaryobjects

Epson Printer WiFi Setup

When your password contains an asterisk.

Quick Start

Use the physical number keypad to the right of the display screen to enter an asterisk.

Detail

primaryobjects

function isRectangleOverlap(rec1: number[], rec2: number[]): boolean {
    const [ rec1_x1, rec1_y1, rec1_x2, rec1_y2 ] = rec1;
    const [ rec2_x1, rec2_y1, rec2_x2, rec2_y2 ] = rec2;

    const isOverlapX: boolean = rec1_x1 < rec2_x2 && rec2_x1 < rec1_x2;
    const isOverlapY: boolean = rec1_y1 < rec2_y2 && rec2_y1 < rec1_y2;

    return isOverlapX && isOverlapY;
};

primaryobjects

npm create vite@latest PROJECT_NAME -- --template react
cd PROJECT_NAME
npm install
npm run dev

primaryobjects

const powersOf2 = (numbers: [number]): number => {
  let count: number = 0;
  const counts = {};
  const matches: [ [number] ] = [];
  
  for (let i: number = 0; i<numbers.length; i++) {
    const element = numbers[i];
    counts[element] = counts[element] ? counts[element] + 1 : 1;
    
    for (let twoPower: number = 0; twoPower < 21; twoPower++) {

primaryobjects

Conway's Game of Life

A demo of cellular automata.