PUBLIC MARKS from Spone with tag regexp

Regex101.com is a free of charge service where you can create, test and have your regular expressions explained. Thanks to the permalink feature, it is a great reference which may even be used in code where you need to explain your regular expressions to co-workers.

A common programming problem: identify the URLs in an arbitrary string of text, where by “arbitrary” let’s agree we mean something unstructured such as an email message or a tweet. I offer a solution, in the form of the following regex pattern...

Regular expressions are a language of their own. When you learn a new programming language, they're this little sub-language that makes no sense at first glance. Many times you have to read another tutorial, article, or book just to understand the "simple" pattern described. Today, we'll review eight regular expressions that you should know for your next coding project.