Since early XE versions C++ Builder supports Delphi units directly added in C++ project and compiles them as well as C/C++ source. However, this approach has several drawbacks:

• Usually, Delphi files are stored in separated folders of other applications and packages. So your C++ project will point to many …

Here are some examples of SQL to generate a sequence of numeric (integer) values from 0 to 99.

ANSI-compatible

SELECT ones.n1 + tens.n2 * 10
FROM
(
  SELECT 0 AS n1
  UNION SELECT 1 AS n1
  UNION SELECT 2 AS n1
  UNION SELECT 3 AS n1
  UNION SELECT 4 AS n1 …

How to install and use Delphi 7 and help files on Windows 8/10 or Server 2012.

Installation

Start Delphi setup and install all required items including help files.

In Windows 8/10/Server 2012 or later (should work on Windows 7 too):

• Create the shortcut to Delphi32.exe
• Open …

Here is the code explaining some methods to pack bit accessing logic in your program.

program project1;

type
  TRec1 = packed record // Doesn't pack at all
    b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11, b12, b13, b14, b15, b16: boolean;
  end;

  TRec2 = bitpacked record // Free Pascal specific …

In the previous article "Crack C# namespaces in 30 seconds" I demonstrated how to make error having no idea about it. So you will have a lovely time in debugging. But in C# you're condemned to use using directive or your code will be unreadable with all these horrible specifiers …

Multiple inheritance of interfaces which are pure abstract classes indeed is not a problem until you need to use the interface implementation in other classes.

Suppose there are two interfaces, the implementation of which will be used in other classes.

class IA
{
public:
    virtual void m1() = 0;
};

class IB : public …

Here is an example how to get N-2 calling procedure information.

Warning: code seeking debugging info is slow so be aware to use it in loops.

Make sure to compile with following options:

• -gl (not requierd but show file and line numbers info)
• -gs (show proc name after address)

var …

The namespaces conception in C# seems to be exhaustive and insufficient at the same time compared with a strong module notation in Oberon-2 and even with a modular programming approaches in Free Pascal/Delphi.

Why insufficient? You cannot declare constants and functions within namespaces but you should add a class …

Firebird doesn't support INSERT BULK command or bcp.exe utility. But the external tables can be a good replacement. Simple example is below.

Check that firebird.conf file allow to create external tables. Write or uncomment line like

ExternalFileAccess = Full

Create external table

CREATE TABLE BCP_DATA EXTERNAL FILE 'с:\temp …

The code below show how to implement very simple but cross-platform "old school" mutex (mutually exclusive semaphore)

interface

type
  TMutex = class
  private
    FFileHandle: integer;
  public
    constructor Create(const AName: string; const WaitForMSec: integer = 10000);
    destructor Destroy; override;
  end;

implementation

uses
  Classes, SysUtils, DateUtils,
  {$IFDEF MSWINDOWS}
  Windows
  {$ENDIF};

function GetTempDir: string …