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

Some experiments take a long time to perform, and waiting around for hours to write down the data every few minutes can be mind-numbing. Also, some experiments happen so fast you couldn t write down the data fast enough. Fortunately, the NXT can automatically log data from any of its sensors into a file. Light level, color, temperature, sound level, and distance can all be logged. You store the numbers in the file with a text format that spreadsheet programs can easily import. Once the data is in a spreadsheet, you can process and plot it to produce graphs for a lab report. Figure 14-1 is a basic data-logging program written in NXT-G. It should be easy to modify it for your particular application. Notice that you must include the Keep Alive block or the NXT will fall asleep during your experiment and ruin everything.

barcode add in for word and excel 11.10 free download, excel 2010 microsoft barcode control, how to change font to barcode in excel, how to make barcodes in excel 2011, microsoft excel barcode font package, barcode font for excel free, free 2d barcode generator for excel, barcode format in excel 2007, how to make 2d barcodes in excel, free barcode generator microsoft excel,

You achieve this by using the underscore (_) in place of the type parameter, as in the first line of the next example (The following example uses the forward operator, |>, which I explain in the The |> Operator section) #light open System.

If you re not already impressed with the Local Variables window, consider this: it also allows you to change the value of variables during runtime. This can be extremely powerful when you want to test the effects of different variable values on the script s output. It s also useful when you think you ve found where a problem is occurring and want to see whether changing a variable value fixes the problem. If changing the variable value fixes the problem, then you just need to find out why the variable value is wrong in the first place. Simply right-click the variable value you want to change, and select Change Value from the context menu. This opens a small prompt window in which you can modify the variable s value, as shown in Figure 7-27. You can enter any valid JavaScript expression into the prompt, including expressions such as new Object(). Be sure that any string literals are enclosed in either double or single quotes. Remember that in the Figure 7-27. Changing a variable value prompt window you can also reference other using the Change Value prompt variables by using the variable name.

Figure 14-1. Light level data-logging program You put data into a file whose name is set in the File Access block menu shown in Figure 14-2. It s also important to close the data file when the program is done, which is what the final File Access block is doing.

let findIndex f arr = Array.FindIndex(arr, new Predicate<_>(f)) let rhyme = [|"The"; "cat"; "sat"; "on"; "the"; "mat" |] printfn "First word ending in 'at' in the array: %i" (rhyme |> findIndex (fun w -> w.EndsWith("at"))) The results of this example, when compiled and executed, are as follows: First word ending in 'at' in the array: 1 Here you import the FindIndex method from the System.Array class, so you can use it in a curried style. If you had not explicitly created a delegate, the identifier f would have represented a predicate delegate rather than a function, meaning all calls to findIndex would need to explicitly create a delegate object, which is not ideal. However, if you had specified a type when creating the Predicate delegate in the definition of findIndex, then you would have limited the use of the findIndex function to arrays of a specific type. Occasionally, this may be what you want to do, but it is not usually the case. By using the underscore, you avoid having to specify a type for the findIndex function, keeping it nice and flexible.

The Watches list is nearly identical to the Local Variables window in that it displays information about variables running within the current scope. The difference between the Watches list and the Local Variables window is that you, the developer, decide what variables are shown in the Watches list. In contrast, the Local Variables window shows all variables available to the currently executing script. Think of the Watches list as the Local Variables list on a diet. To add a variable to the Watches list, right-click anywhere in the Watches window, and select Add Watches Expression from the context menu. A prompt window will appear, allowing you to enter a valid JavaScript expression that identifies the variable you want to watch. In most cases, you ll simply want to enter the variable name. Figure 7-28 shows the context menu and the resulting window.