This page provides an overall cheat sheet of all the capabilities of RegExp syntax by aggregating the content of the articles in the RegExp guide. If you need more information on a specific topic, please follow the link on the corresponding heading to access the full article or head to the guide.

An iterator over the entries of a `HashMap`.

Groups group multiple patterns as a whole, and capturing groups provide extra submatch information when using a regular expression pattern to match against a string. Backreferences refer to a previously captured group in the same regular expression.

An iterator over the elements of a `LinkedList`.

An owning iterator over the values of a `HashMap`.

A lazy iterator producing elements in the symmetric difference of `HashSet`s.

An iterator that splits an environment variable into paths according to platform-specific conventions.

A by-value array iterator.

The JavaScript exception "cyclic object value" occurs when object references were found in JSON. JSON.stringify() doesn't try to solve them and fails accordingly.

A double-ended queue implemented with a growable ring buffer.