Laurence Svekis

Laurence Svekis is a web technology enthusiast, educator, and author who has been working in the field for over 20 years. He has expertise in web development technologies, such as HTML, CSS, JavaScript, jQuery, Bootstrap, PHP, and MySQL. Svekis is a prolific course instructor on Udemy, with over 500,000 students enrolled in his courses. He has authored over 100 online courses, covering a wide range of web technologies and tools, such as Google Apps Script, WordPress, React, Node.js, Express.js, and MongoDB. His courses are known for their practical and hands-on approach, with a focus on real-world projects and examples. In addition to teaching, Svekis is also a published author, with several books to his name Svekis is passionate about empowering people with the skills and knowledge they need to succeed in the rapidly evolving field of web technology. He is committed to providing high-quality educational resources that are accessible to anyone, regardless of their background or experience level.

50 multiple-choice questions related to Functional Programming in JavaScript

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Here are 50 multiple-choice questions related to Functional Programming in JavaScript, covering Pure Functions and Immutability, Map, Filter, Reduce, and other Array Methods, Declarative vs. Imperative Programming, Lazy Evaluation and Infinite Sequences, and Monads, Functors, and Other FP Concepts. Each question includes a detailed explanation of the correct answer. Pure Functions and Immutability Map, Filter, … Read more

Implementing a Debounce Function in JavaScript

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In JavaScript, certain events like window resizing or input changes can trigger functions multiple times in rapid succession. This can lead to performance issues, especially when these functions perform resource-intensive tasks. The debounce technique is a common solution to this problem, ensuring that a function is only executed after a specified period of inactivity. In … Read more

Implementing a Custom Map Function in JavaScript

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In JavaScript, the Array.prototype.map function is a powerful method that allows you to transform the elements of an array by applying a callback function to each element. It returns a new array containing the results of calling the callback function on each element. But what if you wanted to implement your own version of map? … Read more

Creating a Simple Implementation of a Promise with .then Chaining

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In JavaScript, Promises are a powerful way to handle asynchronous operations. They provide a mechanism to execute code after an asynchronous task completes, with support for chaining multiple tasks using the .then method. In this blog post, we’ll explore how to implement a basic version of a Promise from scratch, including support for .then, .catch, … Read more

Deep Cloning an Object in JavaScript

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When working with JavaScript objects, you may encounter situations where you need to create an exact copy of an object. However, simply copying an object with assignment (=) or even using methods like Object.assign() creates a shallow copy. This means that nested objects or arrays within the original object will still reference the same memory … Read more

Node js What Does [Object: null prototype] Mean

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The output [Object: null prototype] { adf: ‘bsdf’ } appears in the console when you log req.body in your Express.js application because of how the body-parser middleware processes incoming JSON data. What Does [Object: null prototype] Mean? The notation [Object: null prototype] indicates that the object being logged is a plain object created with a … Read more

How to Modify Node.js Code to Handle an Object from a JSON File

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The current code reads a JSON file, parses it into an object, and then logs certain values to the console. We’ll go through the steps to make this code more flexible by allowing it to handle a JSON object. Here’s the code as it stands: const http = require(‘http’);const fs = require(‘fs’);const site = http.createServer(function(req, … Read more

Understanding Logger.log in Google Apps Script

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In Google Apps Script, the Logger class provides simple logging functionality that can help you debug your scripts by recording messages in the Google Apps Script log. This log can be viewed in the Apps Script editor under the “Executions” or “Logs” tabs. Basic Usage of Logger.log The Logger.log method is used to record messages. … Read more

Calculating Cost Per Item with Discount Using Google Apps Script

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In this blog post, we will delve into a Google Apps Script function that calculates the cost per item, considering any applicable discounts. This script is especially useful for e-commerce platforms or any other scenarios where discounts and coupon codes are used to determine the final cost of products. We will explain the code in … Read more

Calculating the Total Cost Using Google Apps Script

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Google Apps Script is a powerful tool that allows you to automate tasks and enhance your Google Sheets capabilities. In this blog post, we will demonstrate how to use Google Apps Script to calculate the total cost from a sample data table. This script can be especially useful for financial calculations, budgeting, or any scenario … Read more