Regex (Regular Expression)
A pattern-matching syntax for finding, extracting, and transforming text. In automation: extract invoice numbers from email subjects, validate UK postcode format, or parse log lines into structured fields. Regex is the power tool of text transformation.
Expert insight
One well-crafted regex can replace 50 lines of conditional string logic. Learn it once, use it everywhere.
In a real workflow
A regular expression extracts an order number like "ORD-12345" from email subjects.
Common mistakes
- Overly complex expressions nobody can maintain.
- Patterns that match too much.
Complexity level
Requires some familiarity with automation concepts.
Related terms
See it in action
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