Javascript

Everything related to Javascript.

This article is a continuation of last week’s post on ES2017 Async-Await, detailing the updates of ES2017. Check out the ES2016 plus compatibility table for more information on the current browser support. Most likely, you will need a transpiler. Use […]

ES2017 Object and String Extensions

This entry was posted in ES6 and tagged Javascript on 2nd July 2018 by zsolt-nagy

The ability to write asynchronous functions is a major update in ES2017. In order to understand this chapter, I suggest that you review the chapter on promises. What are asynchronous functions? Asynchronous functions are functions that return a promise. We […]

A Practical Introduction to ES2017 Async-Await

This entry was posted in ES6 and tagged ES6 Functional Programming Javascript on 25th June 2018 by zsolt-nagy

If you have read most of the blog posts of zsoltnagy.eu, you can conclude that most of the articles require at least some basic knowledge about JavaScript. The main exception is the JavaScript Basics category. This article is in the […]

Using JavaScript in 2018 – Experience and Opportunities

This entry was posted in JavaScript Basics and tagged computer science ES6 Javascript Learning Software Engineering on 18th June 2018 by zsolt-nagy

Exercise: Suppose the following tables are given in the form of arrays of objects: [crayon-5b4e44745a3b6711790530/] Translate the following SQL query using map, reduce, and filter: [crayon-5b4e44745a3c3617513713/] You are not allowed to use loops, if statements, logical operators, or the ternary […]

Translating SQL Queries using Map-Reduce-Filter in JavaScript

This entry was posted in ES6 JavaScript Interview Questions and tagged computer science ES6 Functional Programming Javascript Software Engineering on 11th June 2018 by zsolt-nagy

Exercise: What is memoization? What are its benefits? What is the necessary condition for using memoization? Illustrate the benefits of memoization using an example. Remark: Expect these types of questions when bridging theory with practice. You need to know what […]

Memoization in JavaScript

This entry was posted in ES6 JavaScript Interview Questions and tagged ES6 Javascript on 4th June 2018 by zsolt-nagy

Exercise: Create a stopwatch that counts down from a given number of seconds in the format mm:ss. Make it possible to start, pause, and reset the countdown. Make sure you can pass a callback function to the timer that is […]

JavaScript Tech Interview Exercise 16: Stopwatch

This entry was posted in JavaScript Interview Questions and tagged ES6 html5 Javascript on 28th May 2018 by zsolt-nagy

We have skipped a couple of exercises that transformed our Pomodoro app into a Kanban board. Tasks 12 – 15 are great exercises for refactoring, and you can get access to them in ES6 in Practice, but they are less […]

JavaScript Tech Interview Exercise 15: Drag and Dropping Cards

This entry was posted in JavaScript Interview Questions and tagged ES6 Javascript NodeJs NPM regex on 22nd May 2018 by zsolt-nagy

The last few weeks made me think about renaming my book. Because ES6 was ES2015. Of course when I started writing ES6 in Practice, I included those two small ES2016 updates. Then I promised a bonus chapter on ES2017 including […]

ES2018 Regular Expression Updates – an Opinionated Summary

This entry was posted in Regular Expressions and tagged Javascript regex on 14th May 2018 by zsolt-nagy

Exercise: Store the state of the application in a local storage. Make sure the application state is reloaded once you refresh the page. Solution: Clone PomodoroTracker2 from my GitHub repository as a starting point. Alternatively, you can use your own […]

JavaScript Tech Interview Exercise 11: Persistence with Local Storage

This entry was posted in JavaScript Interview Questions and tagged ES6 html5 Javascript JSON Tutorial on 7th May 2018 by zsolt-nagy

You might not know about me that I have conducted tech interviews with over 500 software developers from more than twenty countries with the objective of identifying and hiring the best talent. I have also been in the candidate position, […]

JavaScript Tech Interview Exercise 10: Pomodoro App Markup and Styling Refactoring

This entry was posted in JavaScript Interview Questions and tagged css ES6 html5 Javascript on 1st May 2018 by zsolt-nagy

The article ES6 Strings and Template Literals introduced you to the syntax of ES6 strings and template literals. However, if you wanted to use ES6 template literals for microtemplating, the article itself does not help you. In this article, you […]

How Replacing JavaScript Templating Engines with ES6 Template Literals May Cost You ...

This entry was posted in ES6 and tagged Abstraction ES6 Functional Programming Javascript Maintainability regex Software Engineering UnderscoreJs on 13th February 2018 by zsolt-nagy

You might not know about me that I have conducted tech interviews with over 500 software developers from more than twenty countries with the objective of identifying and hiring the best talent. I have also been in the candidate position, […]

JavaScript Tech Interview Exercise 9: Event Delegation in a Pomodoro App

This entry was posted in JavaScript Interview Questions and tagged ES6 events Functional Programming html5 Javascript regex Tutorial on 6th February 2018 by zsolt-nagy