> For the complete documentation index, see [llms.txt](https://the-artist-xchange.gitbook.io/the-artist-xchange/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://the-artist-xchange.gitbook.io/the-artist-xchange/docs/enumerableset.md). # EnumerableSet *Library for managing ] of primitive types. Sets have the following properties: - Elements are added, removed, and checked for existence in constant time (O(1)). - Elements are enumerated in O(n). No guarantees are made on the ordering. `contract Example { // Add the library methods using EnumerableSet for EnumerableSet.AddressSet; // Declare a set state variable EnumerableSet.AddressSet private mySet; }` As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) and `uint256` (`UintSet`) are supported. \[WARNING] ==== Trying to delete such a structure from storage will likely result in data corruption, rendering the structure unusable. See ] for more info. In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an array of EnumerableSet. ====*