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Tom Utilities

Chuleta de expresiones regulares

Utilidades para desarrolladores

Referencia rápida de sintaxis regex con clases de caracteres, cuantificadores, anclas, grupos, lookaround y escapes.

Cómo usar

Using the cheat sheet

Search for a token or a description to filter the table, then use the pattern directly in JavaScript, Python or any engine that follows the common syntax.

  1. Search for a pattern or keyword.
  2. Read the description.
  3. Copy the token into your expression.

Preguntas frecuentes

Which regex flavour is this?

The common Perl-compatible subset supported by JavaScript, Python, Java and most other engines.

Does the dot match newlines?

By default it does not. Enable the s (dotAll) flag in JavaScript or re.DOTALL in Python if you need it to.