Introducing Regular Expressions baixar o livro de graça

If you re a programmer new to regular expressions, this easy-to-follow guide is a great place to start. You 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 programmer s toolkit, available in various Unix utlilities as well as programming languages such as Perl, Java, JavaScript, and C#. When you ve finished this book, you ll be familiar with the most commonly used syntax in regular expressions, and you ll understand how using them will save you considerable time.Discover what regular expressions are and how they workLearn many of the differences between regular expressions used with command-line tools and in various programming languagesApply simple methods for finding patterns in text, including digits, letters, Unicode characters, and string literalsLearn how to use zero-width assertions and lookaroundsWork with groups, backreferences, character classes, and quantifiersUse regular expressions to mark up plain text with HTML5"