Category: Delphi

Delphi is a well-known rapid application development tool (Rapid Application Development, RAD) under the Windows platform. Its predecessor was the “Borland Turbo Pascal” that was popular in the DOS era. The earliest version was developed by the American Borland company in 1995. The main creator is Anders Hejlsberg. After several years of development, this product has also been transferred to the Embarcadero company. Delphi is an integrated development environment (IDE). The core used is Object Pascal developed from the traditional Pascal language. It uses a graphical user interface as the development environment, and uses IDE, VCL tools and compilers to cooperate with the function of connecting to the database. An application development tool centered on object-oriented programming.

Delphi – Why should I use Tcollections.createlist instead of tList.create?

I added map(), reduce() and where(qlint: string) to my Spring4D branch.
When I wrote these functions, I found the behavior of the list There are differences when they are created in different ways

October 5, 2021By Simo Delphi create, CREATELIST, Delphi, should be used, TCOLLECTIONS, TCOLLECTIONS.CREATELIST, TLIST, TLIST.CREATE, whyLeave a Comment

Array – Create an instance from a class array

My class definition is:

TAnimal = class(TInterfacedObject)
public
constructor Create; overload;
constructor Create(param: string); overload;
end;
IAnimal = interface
procedure DoSomething;

October 5, 2021By Simo Delphi array, class, creation, instanceLeave a Comment

Delphi High DPI switches between its zoom and Windows scales

Some of my customers want to be able to manually extend my application (when the Windows dpi is set to 96), so I have to implement the extension. Unfortunately, these customers cannot set the Windo

October 5, 2021By Simo Delphi Delphi, DPI, high, Self, windows, ZoomLeave a Comment

How to get the last string in TSTRINGLIST

The days I have been looking for how to do this, there is nothing I need to do (or I just don’t understand how to implement a solution).

var
AddressList: TStringList;
i: integer;
begin
Addres

October 5, 2021By Simo Delphi how to get, last, one, stringLeave a Comment

Delphi – What is the standard method for communicating with Win32 executable file?

I have some delphi code. Given a list of items, calculate the total price and consider any special transactions that may apply.

This code uses another A language rewrite is very important.

October 5, 2021By Simo Delphi communication, Delphi, executable, file, method, Standard, Website, what, Win, Win32Leave a Comment

Evaluate multiple Boolean conditions separately, only one can be true (Delphi)

I have a function that evaluates multiple (7 in my case) Boolean variables and conditions, if only one of them is true, the result is true (of course the rest are false ). I have the following code