How to use the regular expression functions provided by the ‘re’ library to match, search, and replace text in your Python programs. Regular expressions, or “regex,” is a system for finding complex ...

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 ...

Tony Northrup is a developer, security consultant and author with more than 10 years of professional experience developing applications for Microsoft Windows. Developers frequently need to process ...

Regular expressions are a powerful tool for manipulating textual information, allowing you to perform the sophisticated processing you describe. Before I explain the solution, let's back up one step ...

When using the MPF you can use regular expressions to add functionality. You see this in application policies that let you filter file names and such. I came up with the idea for this post after I ...

Regular expressions are like power tools: They may look scary, but are easy to use once you understand their basic building blocks. Regular expressions -- those scary strings that might as well be ...

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 for ...

If you’ve struggled with regular expressions that took hours to match when you needed them to complete in seconds, this article is for you. Java developer Cristian Mocanu explains where and why the ...

I'm wearing my regex dunce cap again. I want to return a positive match if I find "this" in a string, but not if I find "this" and also "that" in the string. Put another way: I want to return a ...

When working with regular expressions in a shell script the norm is to use grep or sed or some other external command/program. Since version 3 of bash (released in 2004) there is another option: ...