"request" (model_or_collection, xhr, options) â when a model or collection has started a request to the server.

slicecollection.slice(begin, end) Return a shallow copy of this collection's models, using the same options as native Array#slice.

rest (tail, drop)

findWherecollection.findWhere(attributes) Just like where, but directly returns only the first model in the collection that matches the passed attributes.

indexBy

listenToOnceobject.listenToOnce(other, event, callback) Just like listenTo, but causes the bound callback to fire only once before being removed.

popcollection.pop([options]) Remove and return the last model from a collection. Takes the same options as remove.

forEach (each)

idmodel.id A special property of models, the id is an arbitrary string (integer id or UUID). If you set the id in the attributes hash, it will be copied onto the model as a direct property. Models can be retrieved by id from collections, and the id is used to generate model URLs by default.

groupBy