What is regex: A sequence of characters defining a search pattern, used for finding, replacing, or validating text across programming languages and tools. Why it matters: Regex boosts efficiency by ...

Some say a set of regular expressions comprises a domain-specific language, or DSL; essentially, a mini-programming language. A full-blown programming language like Java or Python can do many things, ...

In this lesson, you’ll learn how to use RegEx (regular expressions) to work with sets of characters. Unlike the ., which matches any single character , sets enable you to match specific characters and ...