---
title: "Regular Expression Library"
url: "https://osherove.com/blog/2003/5/6/regular-expression-library.md"
canonical: "https://osherove.com/blog/2003/5/6/regular-expression-library.html"
published: "2003-05-06T03:11:00"
updated: "2003-05-06T03:11:00"
tags: [".Net Original"]
author: "Roy Osherove"
description: "This looks like a very good regular expression repository Update: Darren Neimke Says: \" Check out the new CheatSheet that Steve added last night --> get to it via the CheatSheet link on the side menu. \" I agree. It's…"
usage: "Licensed under CC BY 4.0 — reuse, quote and adapt with attribution (Roy Osherove, link to the original page)."
license: "https://creativecommons.org/licenses/by/4.0/"
---

# Regular Expression Library

By Roy Osherove May 6, 2003 In [.Net Original](https://osherove.com/blog/category/net-original)

**Historical article** · Originally published May 6, 2003; technical details may be outdated.

[This](http://regexlib.com/) looks like a very good regular expression repository

Update:

[**Darren Neimke**](http://dotnetweblogs.com/DNeimke) Says:

"_Check out the new CheatSheet that Steve added last night --> get to it via the CheatSheet link on the side menu._"

I agree. It's very nice. Still, I'd like to see there some stuff that was **not** copy-paste from MSDN.

## More in .Net Original

[All posts in .Net Original](https://osherove.com/blog/category/net-original)

- May 8, 2003

    ### [How Access 2003 Helped Me Out](https://osherove.com/blog/2003/5/8/how-access-2003-helped-me-out.html)

- May 6, 2003

    ### [UI Threading \*Might\* Suck](https://osherove.com/blog/2003/5/6/ui-threading-might-suck.html)

- May 5, 2003

    ### [Oops! Typed Datasets ARE scalable!](https://osherove.com/blog/2003/5/5/oops-typed-datasets-are-scalable.html)

- May 5, 2003

    ### [DataSets, Web Services, DiffGrams, Arrays, and Interoperability](https://osherove.com/blog/2003/5/5/datasets-web-services-diffgrams-arrays-and-interoperability.html)


---

## About the author

**Roy Osherove**: Senior Solutions Architect at AWS working on AI for production and AI-driven development; author of The Art of Unit Testing and Elastic Leadership, with about 20 years of consulting and training on unit testing, TDD, team leadership and continuous delivery.

### Sites

- [RobotPaper](https://robotpaper.ai/): This blog: AI patterns and anti-patterns, AI and coding agents, and engineering leadership.
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- [The Art of Unit Testing](https://www.artofunittesting.com): The Art of Unit Testing, 3rd Edition (Manning): readable, maintainable, trustworthy unit tests, plus TDD workshops in C#, JavaScript, Java and Kotlin.
- [5whys.com](https://www.5whys.com): Roy's writing on software team leadership: self-organizing teams, surviving chaos, learning mode and the Elastic Leadership model.
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### License

Licensed under CC BY 4.0 — reuse, quote and adapt with attribution (Roy Osherove, link to the original page). License: https://creativecommons.org/licenses/by/4.0/