Meta-characters. There are special characters in regular expressions, some of them include: d matches any digit, equivalent to [0-9]; D matches any character that’s not a digit, equivalent to ...

Regular expressions are great, but remember, the objective is parsing, that means extracting information from a string. Capture groups are usually how you deal with variability.

That’s what [Low Level JavaScript] points out about regular expressions. Sure, a lot of people think they are scary. So why not write your own regular expression parser and engine ?

JavaScript’s RegExp object, which holds a regular expression, is what we need here. Regular expressions are a big subject, and there are plenty of FAQs on them on the Web.

Regular expressions, or ‘regex’, are like an in-line programming language for text searches that allow you to include complex search strings, partial matches and wildcards, case-insensitive ...

The ECMAScript 2025 specification will likely be finalized in June, with finished proposals including JSON modules, new regex capabilities, and new Set methods published by year-end.

Regular Expressions come in very handy in your projects when you’re looking to manipulate text input in the form of a control or a file, whether it’s HTML, SMTP, XML, or another format.

It's possible to build a regex query to search for special characters, but it can become complicated quickly. Plus, fgrep is much, much faster on a large text file. Some Simple, Useful Regex. Okay, ...