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This article introduces you how to analyze. NET regular expressions, the content is very detailed, interested friends can refer to reference, I hope to help you.

. NET regular expressions: source

Regular expressions were designed in the 1950s and exist today. Regular expressions were originally used to describe "regular sets," patterns studied by neurophysiologists. Regular expressions were first proposed by mathematician Stephen Kleene and eventually used by Ken Thompson in two very popular text utilities, qed and grep. Jeffrey Friedl elaborated further on this in his book Mastering Regular Expressions (2nd edition). Those wishing to learn more about regular expression theory and history are advised to check out this book.

. NET Regular Expressions: Evolution

Over the last fifty years, regular expressions have evolved from obscure mathematical concepts to primary functions in tools and software packages. Although many UNIX tools have supported regular expressions for decades, it is only in the last decade that they have found their way into most Windows developer kits. In Microsoft Visual Basic 6 or Microsoft VBScript, regular expressions are difficult to use even under ideal conditions. But with the introduction of the. NET Framework, support for regular expressions has grown to the point where regular expressions are available to all Microsoft developers and all. NET languages.

. NET Regular Expressions: A Brief Introduction

So, what exactly are regular expressions? Regular expressions are a language that explicitly describes patterns in text strings. In addition to simply describing these patterns, regular expression engines can often be used to iterate through matches and use patterns as delimiters to parse strings into substrings, or to replace or reformat text in intelligent ways. Regular expressions provide an efficient and straightforward way to solve many common tasks related to text processing.

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