Michael J.  Fitzgerald
If youâ€™re a programmer new to regular expressions, this easy-to-follow guide is a great place to start. Youâ€™ll learn the fundamentals step-by-step with the help of numerous examples, discovering first-hand how to match, extract, and transform text by matching specific words, characters, and patterns.,Regular expressions are an essential part of a programmerâ€™s toolkit, available in various Unix utlilities as well as programming languages such as Perl, Java, JavaScript, and C#. When youâ€™ve finished this book, youâ€™ll be familiar with the most commonly used syntax in regular expressions, and youâ€™ll understand how using them will save you considerable time.,Discover what regular expressions are and how they work,Learn many of the differences between regular expressions used with command-line tools and in various programming languages,Apply simple methods for finding patterns in text, including digits, letters, Unicode characters, and string literals,Learn how to use zero-width assertions and lookarounds,Work with groups, backreferences, character classes, and quantifiers,Use regular expressions to mark up plain text with HTML5
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Introducing Regular Expressions