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Regular Expression

This guide provides a comprehensive look at regular expressions (regex) in JavaScript, derived from expert sources. It includes definitions, practical examples, and target strings such as common user agent formats. We cover fundamental concepts like simple matching, searching for brackets, ranges, and negation, as well as positioning and anchors. Learn about iteration using metacharacters, and dive deeper into POSIX character class definitions. Ideal for developers seeking to enhance their web technology skills with regex patterns.

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Regular Expression

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  1. Regular Expression JavaScript Web Technology Derived from:http://www.zytrax.com/tech/web/regex.htm

  2. Definitions

  3. Our Example Target Strings • Throughout this guide we will use the following as our target strings: STR1 Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt) STR2 Mozilla/4.75 [en](X11;U;Linux2.2.16-22 i586)

  4. Simple Matching Search For

  5. Brackets, Ranges and Negation

  6. Brackets, Ranges and Negation Search For

  7. Positioning (or Anchors)

  8. Positioning (or Anchors) Search For

  9. Iteration 'metacharacters'

  10. Iteration 'metacharacters' Search For

  11. More 'metacharacters'

  12. Example: More 'metacharacters'

  13. POSIX Character Class Definitions

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