Run examples at: http://egonelbre.com/js/dci/, requires http://egonelbre.com/js/dci/js/dci.js

sample1.js

AttendEvent = Context(
function(event, attendee) {
  Event = event;
  Attendee = attendee;
  Attendee.attend();
}, {
  Attendee: {
    attend: function(){
      this.attendedEvents.push(Event);
      Event.trackAttendence();
    }
  },
  Event: {
    trackAttendence: function(){
      this.attendees.push(Attendee);
    }
  }
});

event = { title: "Something", attendees: [] };
person = { name: "John", attendedEvents: [] };

AttendEvent(event, person);

log("First attendee: " + event.attendees[0].name);
log("First event: " + person.attendedEvents[0].title);

sample2.js

OrganizeEvent = Context(
function(organizer, schedule, event) {
  Organizer = organizer;
  Event = event;
  Schedule = schedule;
  Errors = [];

  Organizer.scheduleEvent();

  return Errors;
}, {
  Organizer:{
    scheduleEvent: function(){
      if(Event.isValid()){
        Schedule.add(Event);
      }
    }
  },
  Event: {
    isValid: function(){
      if(this.title == ""){
        Errors.add("Title is required");
        return false;
      }
      if(this.date == ""){
        Errors.add("Date is required");
        return false;
      }
      return true;
    }
  },
  Errors: {
    add: function(err){ this.push(err); }
  },
  Schedule: {}
});