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

F#. Because of the architecture of the CLR, throwing an exception is pretty expensive quite a bit more expensive than in OCaml. If you throw lots of exceptions, profile your code carefully to decide whether the performance costs are worth it. If the costs are too high, revise the code appropriately. I discuss tools for profiling F# applications in 12.

barcode mit excel erstellen kostenlos, excel barcode font not working, barcode format in excel 2007, excel formula to generate 8 digit barcode check digit, excel barcode add-in, how to make barcodes in excel 2003, vba code for barcode in excel, barcode generator excel 2003 free, barcode add in for excel 2010, activebarcode not in excel,

The Microsoft Script Debugger1 is an extension to Internet Explorer 4 (or greater) that can be used to debug both client-side scripts and server-side scripts running on Microsoft IIS. In this section, we ll focus on its client-side debugging abilities. Installing Script Debugger is as easy as downloading and running the installation program. Once that is complete, you need to ensure that Internet Explorer has debugging enabled. To do so, open the Internet Options window available via the Tools Internet Options menu. On the Advanced tab, under the Browsing submenu, ensure that the Disable Script Debugging item is unchecked, as shown in Figure 7-5.

Figure 13-18. NXT data entry terminal The trick to reading a 16-matrix keypad is to look only at one column at a time. Listing 13-5 shows the code used to read just the leftmost column with buttons 1, 4, 7, and the asterisk. First, we select the column by writing a zero to its bit and 1s to all the rest (hexadecimal EF). Then if you press any of the buttons in that column, you will see zero in the appropriate input bit. If you press buttons in the other columns, they won t register anything because their column line is 1. The button value decoding is done with four if statements that check each of the input bits and assign the correct numeric value for the button. The asterisk is given the special value of 14. Listing 13-5. Read and decode left column WriteBuf[1]=0xEF; // Col 1 I2CBytes(I2Cport, WriteBuf, RdCnt, if(ReadBuf[0]==0xEE) return(1); // if(ReadBuf[0]==0xED) return(4); // if(ReadBuf[0]==0xEB) return(7); // if(ReadBuf[0]==0xE7) return(14);// ReadBuf); Row 1 Row 2 Row 3 Row 4

Lazy evaluation is something that goes hand in hand with functional programming. The theory is that if there are no side effects in the language, the compiler or runtime is free to choose the evaluation order of expressions. As you know, F# allows functions to have side effects, so it s not possible for the compiler or runtime to have a free hand in function evaluation; therefore, F# is said to have a strict evaluation order or be a strict language. You can still take advantage of lazy evaluation but must be explicit about which computations can be delayed, that is, evaluated in a lazy manner. You use the keyword lazy to delay a computation, that is, invoke lazy evaluation. The computation within the lazy expression remains unevaluated until evaluation; it is explicitly forced with the force function from the Lazy module. When the force function is applied to a particular lazy expression, the value is computed; then the result is cached, and subsequent calls to the force function return the cached value, whatever it is, even if this means raising an exception. The following code shows a simple use of lazy evaluation: #light let lazyValue = lazy ( 2 + 2 )

Restart Internet Explorer, and under the View menu there should now be a Script Debugger menu item. Script Debugger is now ready for use. Navigate to a Web page that has some JavaScript you d like to debug. To open Script Debugger, choose the View Script Debugger Open menu item. Script Debugger should open showing the code for the HTML page you re currently viewing, as shown in Figure 7-6.