CodeSchool - BackBone.js - Level 6 - Challenge 6

gistfile1.js

//A (Correct)
var AppointmentList = Backbone.Collection.extend({
  model: Appointment,
  initialize: function(){
    this.on('remove',this.hideModel);
  },
  hideModel: function(model){
    model.trigger('hide');
  }
});

//B (Incorrect):
var AppointmentList = Backbone.Collection.extend({
  model: Appointment,
  initialize: function(){
    this.on('remove',this.model.trigger('hide'));
  }
});