By Marco Cantu
Delphi 2009 guide КНИГИ ; ПРОГРАММИНГ Delphi 2009 guide by way of Marco CantuPublisher: Wintech Italia Srl, Italy 2008 | 401 Pages | ISBN: no longer Assigned | PDF | four MBThis is a publication approximately CodeGear Delphi 2009.You will not locate an creation to Delphi programming, its item Pascal language or its visible part Library in it. during this publication you could learn simply approximately new gains of Delphi 2009 for Win32 in every one of those components. The publication covers Delphi 2009 Unicode help, the hot language positive aspects (such as generics and nameless methods), the advancements of the IDE, the recent sessions of the Run Time Library, the hot parts of the VCL (including the Ribbon control), and the extensions to the database structure and the DataSnap multi-tier technology.As ordinary for my books, i am masking the idea but additionally exhibiting you dozens of examples, you could obtain and play with in your laptop. if you happen to nonetheless do not personal Delphi 2009, you could obtain the trial model and likewise examine the particular courses in motion in a sequence of movies associated from the net web page: http://www.marcocantu.com/dh2009/videos.htmlUploadingDepositfilesUploadbox zero 1 2 three four five
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Additional info for Delphi 2009 Handbook
There are helper functions to access the information you'll generally need to use. Add ('ByteLength: ' + IntToStr (ByteLength (str1))); This program produced output similar to the following: SizeOf: 4 Length: 3 StringElementSize: 2 StringRefCount: -1 StringCodePage: 1200 Is Unicode Size in bytes: 6 ByteLength: 6 The code page returned by a UnicodeString is 1200, a number stored in the global variable DefaultUnicodeCodePage. In the code above (and its output) you can clearly notice that there isn't a direct call to determine the length of a string in bytes, since Length returns the number of characters.
Byte Order Mark Files storing Unicode characters often use an initial header, called Byte Order Mark (BOM) as a signature indicating the Unicode format being used and the byte order form (BE or LE). The following table provides a summary of the various BOM, which can be 2, 3, or 4 bytes long: 00 00 FE FF UTF-32, big-endian FF FE 00 00 UTF-32, little-endian FE FF UTF-16, big-endian FF FE UTF-16, little-endian EF BB BF UTF-8 We'll see in the next chapter how Delphi manages the BOM within its streaming classes.
In all those cases convert your code to use AnsiString38. Creating a Custom String Type Beside using the new AnsiString type, which is tied to the default code page used when compiling the application, you can use the same mechanism to define your own custom string type. btnNewTypeClick( Sender: TObject); var str1: Latin1String; begin str1 := 'a string with an accent: Cantù'; Log ('String: ' + str1); You can use this string type as any other one, but it will be tied to a specific code page. So if you use this string type, when you convert a Latin1String to a UnicodeString (for example, to display it in a call to Log above), the Delphi compiler will add a conversion call.
Delphi 2009 Handbook by Marco Cantu