This article is designed for beginners with little or no experience with regular expressions, but who are familiar with ASP. In this article, I will discuss: If you have questions about this article or regular expressions in general, I invite you to ask them on the regex mailing list at which as I'm writing this has over 350 subscribers.
What if instead of foo you wanted to find all words starting with the letter f, or all three letter words?
Eventually, Ken Thompson built support for regular expressions into qed and grep, both very popular text utilities.
Jeffrey Friedl goes into more depth in his book, Mastering Regular Expressions (2 edition), which is strongly recommended for those wishing to learn more about the theory and history behind regular expressions.
Using regular expressions in Microsoft® Visual Basic® 6 or Microsoft® VBScript was awkward at best, but with the introduction of the . Regular expressions are a language that can be used to explicitly describe patterns within strings of text.
NET Framework, regular expression support is top-notch and available to all Microsoft developers and all . In addition to simply describing such patterns, regular expression engines can typically be used to iterate through matches, to parse strings into substrings using patterns as delimiters, or to replace or reformat text in an intelligent fashion.