BB reset documentation

gistfile1.txt

reset collection.reset(models, [options]) 

Adding and removing models one at a time is all well and good, but
sometimes you have so many models to change that you'd rather just
update the collection in bulk. Use reset to replace a collection with a
new list of models (or attribute hashes), triggering a single "reset"
event at the end. Pass {silent: true} to suppress the "reset" event.
Using reset with no arguments is useful as a way to empty the
collection.

Here's an example using reset to bootstrap a collection during
initial page load, in a Rails application.

<script>
  Accounts.reset(<%= @accounts.to_json %>);
</script>