class app.Collection  constructor: (objects = []) ->    @reset objects   model: ->    app.models[@constructor.model]   reset: (objects = []) ->    @models = []    @add object for object in objects    return   add: (object) ->    if object instanceof app.Model      @models.push object    else if object instanceof Array      @add obj for obj in object    else if object instanceof app.Collection      @models.push object.all()...    else      @models.push new (@model())(object)    return   remove: (model) ->    @models.splice @models.indexOf(model), 1    return   size: ->    @models.length   isEmpty: ->    @models.length is 0   each: (fn) ->    fn(model) for model in @models    return   all: ->    @models   contains: (model) ->    @models.indexOf(model) >= 0   findBy: (attr, value) ->    for model in @models      return model if model[attr] is value    return   findAllBy: (attr, value) ->    model for model in @models when model[attr] is value   countAllBy: (attr, value) ->    i = 0    i += 1 for model in @models when model[attr] is value    i