Elevator Saga – An elevator programming game

I'm not a developer of the game but:

DestinationQueue handling: It is not redundant, those are different options. Just to give an valid example: Add something to the queue, sort the queue, make the elevator run the updated and sorted queue.

Having both goingUpIndicator and goingDownIndicator is probabaly necessary to get this abritrary third state (both enabled / both disabled) which essentially indicates that the elevator will go in both directions.

Yeah! Something I think about occasionally is traffic-light optimization problems, optimizing for throughput, wait-time, safety etc. I think it could work well in a packaging similar to Elevator Saga.

Yeah this is basically correct. There is nothing really preventing an elevator from reporting that it's going both up and down. The up/down indicators are used for two things: 1. To shut off the up/down request indicators correctly on the floor when the elevator arrives. 2. By passengers to decide whether to get on an elevator or not.

Okay, didn't read or look (currentFloor is already defined) and this won't work in this context.

Here is another approach that brought me through till challenge #7:

    {   
        init: function(elevators, floors)  // hook up events
        {
            // these are the global wish lists that idle elevators choose from (key are floor numbers, values are number of people): 
            var wishListUp = {}, wishListDown = {}; 

            for (var i = 0, l = elevators.length; i  0)
                    {
                        this.destinationQueue = this.destinationQueue.filter(function(d) { return d != floorNum; });  // remove from later
                        this.destinationQueue.unshift(floorNum);  // add as immediate next destination
                        this.checkDestinationQueue();  // announce modification
                    }
                    else if (this.loadFactor()  0)  // assume capacity for 10 people with regular weight
                                    //    delete wishListUp[floorNum];  // mark as visited
                                    this.destinationQueue.unshift(floorNum);  // add as immediate next destination
                                    this.checkDestinationQueue();  // announce modification
                                }
                                break;
                            case -1: // going down
                                if (wishListDown[floorNum])  // are people waiting to go down from here?
                                {
                                    //if ((1.0 - this.loadFactor()) * 10.0 - wishListDown[floorNum] > 0)  // assume capacity for 10 people with regular weight
                                    //    delete wishListDown[floorNum];  // mark as visited
                                    this.destinationQueue.unshift(floorNum);  // add as immediate next destination
                                    this.checkDestinationQueue();  // announce modification
                                }
                                break;
                            case 0:  // final destination
                            default: 
                                break; 
                        }
                    }
                }); 

                elevator.on("stopped_at_floor", function(floorNum)  // one destination reached
                {
                    processWishList(); 
                    updateIndicators(this);  // next direction
                });
            }

            for (var i = 0, l = floors.length; i