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Pessimistic Lock with Atomicity: A Pragmatic Approach

I want to remind you that this post does not follow a chronological order, in the future I may make two new posts, one about an optimistic lock in MongoDB and another about a comparison between the two locking models.

I will use the NoSQL database (MongoDB) together Node.js and Mongoose to explain how to work with a document lock

Enjoy reading! 😃

Summary

• What is atomic?
• Explain use case

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const list = document.getElementById('list')

const createCard = ({img: url, username}) => {
  const div = document.createElement('div')
  div.classList.add('card')
  
  const img = document.createElement('img')
  img.src = url
  
  const span = document.createElement('span')

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Overiew

The @babel/preset-flow, animate.css, wow.js and http-server are depends not required.

Required dependencies

pnpm add -D babel-loader @babel/core @babel/preset-env @babel/preset-react @rspack/cli @rspack/core @rspack/dev-server @rspack/plugin-react-refresh react-refresh css-loader sass-loader style-loader react react-dom

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{
	"$schema": "https://biomejs.dev/schemas/1.8.3/schema.json",
	"organizeImports": {
		"enabled": true
	},
	"linter": {
		"enabled": true,
		"rules": {
			"recommended": true
		}

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import React, { useState, useRef } from 'react';

import {
  SafeAreaView,
  StyleSheet,
  Text,
  View,
  TouchableHighlight,
} from 'react-native';

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Atalhos do IntelliJ

Principais

Caiu no IntelliJ agora?

Aprenda só esses:

Tipo de Atalho	IntelliJ IDEA

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const items = []
// simulate request add item using api
function api(id, date, country) {
  const item = {
    id,
    date,
    timestamp: Date.parse(date), // timestamp
    country
  }
  items.push(item)

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<?php
namespace app\modules\api\services\pagarme\orders;

class CheckoutService
{
  private string $SECRET_API_KEY = '';
  private array $headers;
  public function __construct()
  {
    $username = $this->SECRET_API_KEY;

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https://linux.how2shout.com/how-to-install-php-7-4-on-amazon-linux-2/

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function isTimeFormatValid(timeString) {
  const timeRegex = /^(?:(?:([01]?\d|2[0-3]):)?([0-5]?\d):)?([0-5]?\d)$/;
  const dateTimeRegex = /^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/;

  return timeRegex.test(timeString) || dateTimeRegex.test(timeString);
}

function calculateHourlyRate({ startTime, endTime, pricePerHour }) {
  // Check if start time and end time are in a valid format
  if (!isTimeFormatValid(startTime) || !isTimeFormatValid(endTime)) {