How do you find out if a user has entered a valid email address? Do you check for an at-sign, or is it more complicated? For many developers the answer is a regular expression, a little bit of code ...

Vincent Danen goes over some basic regular expressions. They are handy for developers and programmers, of course, and can even be employed for Google searching. As a Linux user or administrator, the ...

If you’ve ever done any serious programming you’ll have run into something called regular expressions: … (abbreviated regex or regexp and sometimes called a rational expression) is a sequence of ...

Not a guide to negotiating the back-to-school barbecue, but a handy guide to manipulating text. Ramsay answers key questions like: Why should I care? How can I improve my regex skills? Do I need ...

Regular expressions come in handy for all varieties of text processing, but are often misunderstood--even by veteran developers. Here's a look at intermediate-level regular expressions and what they ...

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, ...

Imagine you are looking for a name in a telephone directory, but you can't remember its exact spelling. You can spend ages searching through all the possible combinations, unless you have a tool that ...

There are two types of people in the world: those who have no idea what a regular expression is, and those who not only know what they are but can compose them on the fly and tend to use them in ...

These are the formal rules for forming basic UNIX regular expressions. For some simple examples, skip to Simple Examples. The rules come from the Solaris 7 regexp(5) manual page. The I2A2 reflector ...

In the Star Wars universe, not everyone uses a lightsaber, and those who do wield them had to build them themselves. There’s something to be said about that strategy. Building a car or a radio is a ...