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edX

Introduction to Regular Expressions in Javascript

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Overview

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Learn the foundations of regular expressions in JavaScript, including how to match text, define pattern rules, and target specific parts of strings.

Progress to capture groups, text transformations, input validation, flags, and lookaheads. You will apply these techniques to extract structured information, clean data, and implement conditional matching logic.

Explore performance, international text, maintainable pattern design, and large-file processing. The path concludes with building a complete data-processing pipeline that applies regular expressions to a practical workflow.

Syllabus

  • Write regular expressions for matching text in JavaScript
  • Extract structured data with capture groups
  • Clean, reformat, and transform strings using regex patterns
  • Validate user input with flags and conditional matching techniques
  • Handle Unicode and international text reliably
  • Optimize patterns for efficient large-scale text processing
  • Build a maintainable regex-based data-processing pipeline

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