If you stick to the concepts that I cover later, they will work across most flavors and Linux utilities. You don't need to ...

Pattern matching is the process of searching text to identify matches, or strings that match a regex’s pattern. Java supports pattern matching via its Regex API.

A long time ago, I wrote a utility for an employer that allowed testers to perform verification on data coming out of a hardware box using a regular expression language. It allowed users to ...

A full-blown programming language like Java or Python can do many things, but regex does one thing only: match text against patterns. An individual regular expression is expressed as a string of ...

Regular expressions can be used for partner matching, text processing, data validation, and much more. Also: 5 Linux commands I use to keep my device running smoothly The one caveat to using ...

For example, matching the pattern “X” with a string: “XyyX” could match the first X or both, it just depends. Again, for grep, it doesn’t matter. If the line matches at least once, that ...

Now that we know how to work with regular expressions and the different methods that are available to interact with, let’s spend some time building regular expressions to match the patterns we want.

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. Perl has long been an extremely popular choice for text ...

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 ...

This group consists of CALL RXCHANGE, CALL RXFREE, CALL RXSUBSTR, RXMATCH, and RXPARSE, and comprises the character string matching category for functions and CALL routines. For a description, see ...