> For the complete documentation index, see [llms.txt](https://simpldb.js.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://simpldb.js.org/documentation/collection/reset.md).

# .reset()

Resets the keys with default values from the entries that match the provided filter to their default values. Resets the keys with default values from all the entries if no filter is provided.

### reset(filter)

| **Parameter** | **Description**                                                                                                                                                                                                                                                         |
| ------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| filter        | <p><a href="https://developer.mozilla.org/en-US/docs/Glossary/Callback_function">Callback</a> (optional)</p><p>Function to test each element of the array. Return a value that coerces to <code>true</code> to keep the element, or to <code>false</code> otherwise</p> |

| **Returns**                                                                                                                                                        | **Description**   |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----------------- |
| [Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[Data](https://simpldb.gitbook.io/docs/types-and-interfaces/data)> | The reset entries |

```javascript
// Note: BankAccounts is a collection created with
// a default value of 0 for a key named "balance"

BankAccounts.getAll();  // [{ id: 1, balance: 0 }, { id: 2, balance: 850 }] 

BankAccounts.reset(acc => acc.id === 2); // [{ id: 2, balance: 0 }] 

BankAccounts.getAll();  // [{ id: 1, balance: 0 }, { id: 2, balance: 0 }] 
```