Many programming languages feature regular expressions—or “regex” for short—which are used to find patterns in strings of text. A regex library is a mini-language for describing patterns ...

Like riding a bike, knowledge of regular expressions will stay with you forever, allowing you to manipulate text quickly and easily. In this part of the series, Ondrej focuses in on groups, ...

Quick: If you shout "regular expressions" in a crowd of Linux users, what happens? Answer: Everyone will tell you the right way to use them, and every answer will be different. Regular expressions ...

A quick run down on how you can use regular expressions in your own programs to give you more power over searching and substituting text.

Fast track your regular expressions with the help of possessive quantifiers, independent grouping, lookarounds, and the regex pattern-matching engine itself.

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 ...

Bash's regular expression comparison operator takes a string on the left and an extended regular expression on the right. It returns 0 (success) if the regular expression matches the string, otherwise ...

Figure 1. Now what if you'd like to know what the string that was matched? To do this, we'll use regex groups. Whenever a match is found and a regex group is used; (), the [regex] type accelerator has ...

Regular expressions (or REGEX) are search patterns that can be used to check if a string of text conforms to a given pattern and extract or replace strings of text that match a given pattern ...