ASP.NET PDF Viewer using C#, VB/NET

print_endline "Whack the return to finish!" read_line() |> ignore timerEnabled <- false It is also possible to remove handlers from events To do this, you must keep the function you are going to add to the event in scope; you can pass it to the event s RemoveHandler method The RemoveHandler method accepts a delegate, which is an object that wraps a regular NET method to allow it to be passed around like a value This means the handler function must be given to the event already wrapped in a delegate and must therefore use the event s AddHandler (or Removehandler) method instead of its Add (or Remove) method Creating a delegate in F# is straightforward You simply call the delegate s constructor, the same way you call any constructor for an object from any non-F# library, passing it the function that delegate should wrap.

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By far the easiest way to connect to the NXT is to order extra cables and just cut them in half. That gives you the plugs you need for two homebrew projects with wires already connected. The cable jacket is rather tough and must be cut with care so that you don t cut the insulation on the wires inside. Here are the step-by-step instructions: 1. Strip 2 inches (5cm) of the black jacket with a sharp knife, as illustrated in Figure 3-16. Be very careful not to hurt yourself or damage the underlying wires. Once stripped, the NXT cable contains six colored wires; in the photo in Figure 3-17, from left to right, they are blue, yellow, green, red, black, and white.

Writing JavaScript is no different In the vast majority of cases, you ll have no need to optimize any code for performance reasons However, sometimes you ll need to do some performance tweaks Before you can optimize code, though, you first need to determine what code needs to be optimized Venkman has a built-in performance profiling utility that can help you do just that The Performance Profiling tool in Venkman automatically monitors your script and tracks the amount of time spent in each function, in addition to the number of times each function is called The Performance Profiling tool exports its data to HTML, XML, CSV, and text formats To enable the Performance Profiling tool, simply click the Profile button located on the Venkman toolbar (see Figure 7-31) When activated, the Profile button will have a small green checkbox in it.

#light open System open SystemWindowsForms let form = let temp = new Form() let stuff _ _ = ignore(MessageBoxShow("This is \"Doing Stuff\"")) let stuffHandler = new EventHandler(stuff) let event = new Button(Text = "Do Stuff", Left = 8, Top = 40, Width = 80) eventClickAddHandler(stuffHandler) let eventAdded = ref true let label = new Label(Top = 8, Left = 96) let setText b = labelText <- (Printfsprintf "Event is on: %b" !b) setText eventAdded let toggle = new Button(Text = "Toggle Event", Left = 8, Top = 8, Width = 80) toggleClickAdd(fun _ -> if !eventAdded then eventClickRemoveHandler(stuffHandler) else eventClickAddHandler(stuffHandler) eventAdded := not !eventAdded setText eventAdded) let dc c = (c :> Control) tempControlsAddRange([| dc toggle; dc event; dc label; |]); temp do Application.

Strip all the wires or only the ones you need if your sensor just uses a few of them. This operation is illustrated in Figure 3-18.

From now on, the Performance Profiler will record performance metrics for all JavaScript running within the current browser window Click the button again to stop collecting performance data Once you ve collected some performance data, it s Figure 7-31 The Profile toolbar time to view it to see where the bottlenecks occur Select button when activated the Profile Save Profile Data As menu item, as shown in Figure 7-32 This will open the Save As window, giving you the chance to select the name of the file and the file format The text format seems to be the most easily read format Enter the required data, and click OK Once you ve saved the performance data, be sure to select the Profile Clear Profile Data menu item to clear out the data buffer for the next use Figure 7-33 displays an example of the profiler tool s output.