documentcloud/backbone — pull request #2037 by dgbeck (2012-12-28 01:24:33+00:00)
Title: unset multiple model attributes at once

Adds support for unsetting multiple model attributes at once by passing an array as the first argument to model#unset. A unit test for this functionality is also included.

For example:

```javascript
myModel.unset( _.without( _.keys( myModel.attributes ), "id" ) );
```

Will unset all attributes except for the `id` attribute.