Installing Delphi 7 on Windows 7/8/10/Server 2012

| category: My notes | author: st
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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 …

Sorted map vs hashed map

| category: Testing | author: st
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In theory, hash map structure should be very fast on retrieving by key operations, close to O(1) like for an array. A sorted map (keys are sorted) should be O(log2 N) instead. The following test checks the difference.

Common scenario

We will use one tester class per …

Watching heap memory usage in Free Pascal/Delphi

| category: Testing | author: st
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Free Pascal (like Delphi) provide some useful functions to watch heap memory state in your application.

function GetHeapStatus: THeapStatus;

THeapStatus is documented here

Example of using this function is below

program ProgWatchMem;

uses
  Math, FGL;

type
  TLongIntArr = array of LongInt; // LongInt is a 4-byte signed integer
  PLongIntArr = ^TLongIntArr;
  TMySortedMap = specialize …

Interface implementations and multiple inheritance in C++

| category: Programming | author: st
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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 …

GenieLamp

| category: Design | author: st
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GenieLamp is the software factory and model-driven development framework. You have no more to write a boilerplate!

Quick start on the project's wiki.

I'm looking for contributors, please, contact me at Github

how it works