indexOf

lastIndexOf

previousAttributesmodel.previousAttributes() Return a copy of the model's previous attributes. Useful for getting a diff between

constructor / initializenew Backbone.Collection([models], [options]) When creating a Collection, you may choose to pass in the initial

previousmodel.previous(attribute) During a "change" event, this method can be used to get the previous value of a changed

extendBackbone.Model.extend(properties, [classProperties]) To create a Model class of your own, you extend Backbone.Model

isValidmodel.isValid() Run validate to check the model

cidmodel.cid A special property of models, the cid or client id is a unique identifier automatically assigned to all models

emulateHTTPBackbone.emulateHTTP = true If you want to work with a legacy web server that doesn't support Backbone's default REST/HTTP

sample