If you use Excel 40 hours a week (and those are the weeks you are on vacation), welcome to the MrExcel channel. Home to 2,400 free Excel tutorials. Bill "MrExcel" Jelen is the author of 67 books about ...

Functional programming, as the name implies, is about functions. While functions are part of just about every programming paradigm, including JavaScript, a functional programmer has unique ...

This tutorial provides a comprehensive guide to JavaScript Map and Set, explaining their differences, use cases, and how to effectively utilize them. JavaScript offers a rich set of data structures ...

A regex is considered a literal, so the pattern must be wrapped in slash characters (/). If we examine the “Matching a Username” regex, you'll see that this is true: /^ [a-z0-9_-] {3,16}$/ Note: ...

Regular expressions have been part of the programmer’s toolkit for a long time, with their creation by Stephen Cole King in 1951. Their ability to match word patterns make them a powerful tool for ...

While browsers are marching toward supporting speech recognition and more futuristic capabilities, web application developers are typically constrained to the keyboard and mouse. But what if we could ...