Mutant Collection

mutant_collection.js.coffee

class MutantCollection extends Backbone.Collection
  constructor: (collection, mutator, options = {})->
    super(collection.map(mutator), options)

    @listenTo collection, 'reset', ->
      @reset collection.map(mutator)

    @listenTo collection, 'add', (model)->
      @add mutator(model)

    @listenTo collection, 'remove', (model)->
      @remove mutator(model)