Questions about MMO demo client

Amaz1ng

this.actionQueue.EnqueueAction(
                () =>
                    {
                        this.itemPositions.Add(item, position);

                        // update radar every 10 seconds
                        IUnsubscriber positionUpdates = item.PositionUpdateChannel.SubscribeToLast(
                            this.fiber, this.UpdatePosition, Settings.RadarUpdateInterval);
                        IUnsubscriber disposeMessage = item.DisposeChannel.Subscribe(this.fiber, this.RemoveItem);
                        var unsubscriber = new UnsubscriberCollection(positionUpdates, disposeMessage);
                        this.itemSubscriptions.Add(item, unsubscriber);

                        this.PublishUpdate(item, position, Reliability.Unreliable);
                    });

What is the ()=> ?

Amaz1ng

Operation(OperationCode = (byte)OperationCode.CreateWorld)

And this...what does this do?

Amaz1ng

public new void AddItem(Item item)
{
throw new ArgumentException("add MmoItem instead of Item");
}

And what the hell...what is this? How are you using "new" like this?

Boris

Amaz1ng wrote:

What is the ()=> ?

It's called Lambda Expression; see http://msdn.microsoft.com/en-us/library/bb397687.aspx

Boris

Amaz1ng wrote:

Operation(OperationCode = (byte)OperationCode.CreateWorld)

And this...what does this do?

This is an attribute that is used only if you compile with conditional compilation symbol "OperationDispatcher". The operation dispatcher maps operation requests to methods with the Operation attribute; in this case operation code CreateWorld.
If you don't use the operation dispatcher the requests are dispatched with a switch-case statement.

Boris

Amaz1ng wrote:

public new void AddItem(Item item)
{
throw new ArgumentException("add MmoItem instead of Item");
}

And what the hell...what is this? How are you using "new" like this?

the "new" keyword is an alternative to "override". It's used if the base method is not "virtual".