Sams Teach Yourself Delphi 4 in 21 Days

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Delphi will be able to leverage features of the two platforms without any tie-ins to a specific operating system, allowing your Web server applications to run on the two most widespread operating systems for Internet servers. Elasticity and Performance – The language you choose must be flexible enough to let you add more programs or features in it. The first computer program was written for the Analytical Engine by mathematician Ada Lovelace to calculate a sequence of Bernoulli Numbers. to perform data-processing tasks. was the first mechanical calculator utilizing gears of various sizes and configuration to perform calculations.

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Tomes of KYLIX: The Linux API (Wordware Delphi Developer's

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Tutorial also covers fetching XML from a webserver, as it was written in connection with the Poseidon SNMP / XML LAN / internet "thermometer" (from HW group), but it can be revised to read from other sensors. (Delphi 2, plus a free third party component, ICS. The user clicks on a button or enters text into a box and your event loop is activated and calls a handler to do something. Although MyObject holds an instance of TDescendant, it is declared as TAncestor.

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Mastering Delphi 6

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Its constructor, Create, is inherited without change from TObject, and so is not redeclared. The book will teach the basics of Python programming installation, and so on and then will move on to projects. To define a routine with a variant open array parameter, specify array of const as the parameter's type. The GNU Pascal compiler is one notable exception, being written in C. DLL_THREAD_DETACHIndicates that a thread is exiting cleanly. To believe its creator and custodian, Sun Microsystems, Java is all the programming language you'll ever need.

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Delphi Components Master Class

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Get your applications ready for the path to the Microsoft. It is one of the most successful IDEs created by Borland because of its stability, speed and low hardware requirements, and remained in active use as of 2011. Borland CaliberRM for requirements management. Except for ^, is, and in, all operators can take operands of type Variant. It turned out to be harder than I had expected to rewrite the programs in Pascal. The topics include the following areas of ...

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Delphi 2 Unleashed

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With a single-byte character set (SBCS), each byte in a string represents one character. LE pathSpecifies the directory where the compiled package file will be placed. Tk is a graphical user interface toolkit that takes developing desktop applications to a higher level than conventional approaches. That is, the structure of all TStudent objects is identical, and that structure is determined by the class declaration. Follows a "principle of least surprise", each thing must be intuitive.

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Delphi COM Programming

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When the keyword final is applied to a virtual method, no ancestor class can override that method. Both languages use a large class library, what the VCL is to Delphi is the framework class library, also known as the .net FCL, to C#. Method1; begin // end; end. test1.h: #ifndef Test1_H #define Test1_H class Test1 { public: Test1(void); ~Test1(void); void method1(void); }; #endif // Test1_H test1.cpp: #ifndef Test1_H #include "test1.h" #endif Test1::Test1(void) { // } Test1::~Test1(void) { // } void Test1::method1(void) { // } Encapsulation refers to the hiding of implementation details such that the only way to interact with an object is through a well-defined interface.

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Delphi Made Simple (Programming Made Simple)

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C++Builder is a rapid application development (RAD) environment. The automatable types are Byte, Currency, Real, Double, Longint, Integer, Single, Smallint, AnsiString, WideString, TDateTime, Variant, OleVariant, WordBool, and all interface types. History of programming languages • • • • • • • • • • • • • • • • • 1952. Notice that size qualifiers are not necessary when TASM has enough information by context to figure out the data size involved.

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Building Internet Applications With Delphi 2

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Delphi's object orientation features only class- and interface-based polymorphism. If extra elements are added to the model. Your classes can declare their own constructors in a similar manner to the way in which you declare normal methods. Although not fully functional, IDLE offers a glimpse of what's to come in the future. This enables them to watch what you type and provide relevant contextual information. For exampletype TMethod = procedure of object; TNotifyEvent = procedure(Sender: TObject) of object;These types represent method pointers.

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Developing Windows Applications Using Delphi

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Pascal was originally developed as a general purpose language "suitable for expressing the fundamental constructs known at the time in a concise and logical way", and "its implementation was to be efficient and competitive with existing FORTRAN compilers" [9] but without low-level programming facilities or access to hardware. It is not in any way responsible, and has no legal liability, in respect of the contents of any other site referenced from this site, nor for information provided through that site.

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Peter Norton's Guide to Delphi 2

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Visual Basic Foo(«parameters») Sub Foo(«parameters») • instructions Function Foo(«parameters») As type • • • instructions Foo = value Sub Main() • instructions End Sub End Sub End Function Visual Basic. end..»[a] «label • label declarations» program name. For example,type TRectangle = class private FCoordinates: array[0..3] of Longint; function GetCoordinate(Index: Integer): Longint; procedure SetCoordinate(Index: Integer; Value: Longint); public property Left: Longint index 0 read GetCoordinate write SetCoordinate; property Top: Longint index 1 read GetCoordinate write SetCoordinate; property Right: Longint index 2 read GetCoordinate write SetCoordinate; property Bottom: Longint index 3 read GetCoordinate write SetCoordinate; property Coordinates[Index: Integer]: Longint read GetCoordinate write SetCoordinate; ... end;An access method for a property with an index specifier must take an extra value parameter of type Integer.

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