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

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 ...

This is one of those occasions that a Perl solution comes easiest to mind for a particular pattern matching: /\d{5}\w\d{1}$/ will match only the second line below.<BR><BR>red12345a2bb<BR ...

If you’ve programmed in Perl or any other language with built-in regular-expression capabilities, then you probably know how much easier regular expressions make text processing and pattern ...

A pop-up menu lets you choose from several different languages, including C#, Perl, PHP, Python, Ruby, and JavaScript. Then just click the Copy Code button and your regex pattern will be placed on ...

I'm confused by Perl's regex abilities. There seems to be a lot of duplicate flags: ^ and \A both match the beginning of a string. $ and \Z both match the end. It seems redundant and confusing.

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 ...