Simple .NET/ASP.NET PDF document editor web control SDK

On the Memory page, click the Other file type (see Figure 14-6). Select the appropriate data file name and click the Upload button. Save the file somewhere on your computer where you can feed it to your spreadsheet program. Make sure that you delete the file from the NXT, or else the next time you run the program it will just add the new data to the end of the old file.

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The pattern match rules are formed in the same way except they are used with the try with construct instead of the try match construct The next example shows two NET exceptions being thrown and then caught The exceptions thrown are pattern matched over, and a different message is printed to the console depending on the type of exception thrown #light try if SystemDateTimeNowSecond % 3 = 0 then raise (new SystemException()) else raise (new SystemApplicationException()).

Implementing the Fade Anything Technique (FAT)

with | : System.ApplicationException -> print_endline "A second that was not a multiple of 3" | _ -> print_endline "A second that was a multiple of 3"

Figure 14-6. Memory tab You re probably familiar with the handheld light sticks used as emergency flashlights. They also make a tiny version that is used for fishing lures, and you can purchase these light sticks at sporting goods stores. The smaller light stick is easier to enclose in a box made out of LEGO bricks, as shown in Figure 14-7. Seal around the Light or Color Sensor with black electrical tape to make sure that no stray light bothers the experiment.

The pass-forward, pipe-forward, or just forward operator (|>) is useful when working with NET libraries This is because it helps the compiler infer the correct types for method parameters without the need for explicit type annotations To understand why this operator is useful, it is helpful to probe a little deeper into to how right-to-left type inference works Consider the following simple example, where you define a list of integers, called intList, of type int list and then pass this list as the second argument to the library function Listiter The first argument to Listiter is a function of type int -> unit: let int_list = [ 1 ; 2 ; 3 ] Listiter (fun i -> print_int i) int_list Now you need to understand how these expressions in the program were assigned their types.

One of the really slick things about Ajax is that you can modify just part of a Web page. Rather than repaint the entire view, you can update just the part that changes. While this is a handy technique, it may confuse users who are expecting a full-page refresh. With this in mind, 37signals used the Yellow Fade Technique (YFT) in its flagship Basecamp product as a way of subtly indicating to the user what had changed. YFT does just what it suggests: the part of the page that changed is repainted in yellow, and it slowly fades back to the original background color. The Fade Anything Technique (FAT) pattern is similar in nature. In essence, the only real change is the color you use to fade; after all, yellow might not be the best option for you. Implementing this technique is not terribly difficult; you can find sample code using your favorite search engine. For an example of this pattern, see Figure 8-1. The new stories are highlighted in gray, which allows users to easily identify the freshest material.

When you re ready, break the little vial inside the glow stick to energize it, quickly put it in the box, put the lid on, start the program, and come back in an hour. Retrieve the data file and open it with a textbased editor such as Notepad. You can see the first few lines of the data file in Figure 14-8. In the Edit pull-down menu, pick Select All and then Copy.