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Delphi is a language for rapid development of native Windows, OS X and iOS applications through use of Object Oriented Pascal. The name also refers to the Delphi IDE, which is used to help edit and debug Delphi projects more efficiently.

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The code below groups a list by either number or letter, as seen below: 1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B or 1A, 2A, 3A, 4A, 5A, 1B, 2B, 3B, 4B, 5B The option is configurable by the user via ...
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I am trying to learn callbacks in Delphi (7). Could not find a complete simple tutorial, so I puzzled together a few bits here and there. This is my first attempt, of course trivial. My form contains ...
MyICQ's user avatar
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I'm building a small Delphi application where a user can input a file or directory manually by typing it or by selecting it from a dialog . Since it can be input manually, I want to ensure that I save ...
AlexV's user avatar
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I want to use TIdTCPClient to connect to Redis from a web server application made with Delphi and TWebModule. Currently on ...
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(I asked this Question in stackoverflow (Delphi) and they suggested that I try here. Is there a site to submit my Delphi 7 coding to? Hi I am learning how to build compound components. My latest ...
dcs's user avatar
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I need to calculate the value for the following function: $$f(n) = -1 + 2 - 3 + ... + -1^n$$ The time limit to calculate a given value of \$n\$ is less than 1 second. My approach does not meet that ...
CouldnoT B-Zone's user avatar
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Intro If you want to know, then about 10+ years ago, I started a journey on the (best in my country) color picker for WinXP, later Win7. Since now it is hardly compatible with Win10 and HiDPI (work in ...
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I'm building a "sliding puzzle" game. This is the animation code for when you click a Tile. This "loop" function is running all the time. When you click a tile, if it's available to move, I set the "...
nick's user avatar
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2 answers
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How can I make this code faster? the string can contain characters such as ", .?#" and possibly others. ...
hikari's user avatar
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1 answer
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I have created this function for Delphi 10.1 Berlin to validate an email address entered by the user: ...
user1580348's user avatar
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1 answer
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I am trying to write a generic function for loading a function from a DLL library. I am in no way an expert on DLLs, that is why I ask. We have discussed it first in my Stack Overflow question to ...
Vlastimil Burián's user avatar
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I recently coded a game of hangman and wanted to know, A: Are there any places it could be more efficient? B: Are there any things that are distinctly wrong with it, since I know people seem to say ...
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I hope someone can guide me in a way to make this code more efficient. Please explain the things you do simply because I'm no pro so more complex things I am unlikely to get. If you have issues with ...
CatCalledBlep's user avatar
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I am running Delphi XE6. I recently integrated all of my read-only language INI files into the executables. As a consequence, I need to enumerate RCData resources (and then simply filter out the ...
Vlastimil Burián's user avatar
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I am sending a string from an anonymous thread to the UI with PostMessage in the following code: ...
user1580348's user avatar
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i want implement a progress event on TFileStream for read/write operation for assign on it a progress bar. I have create a clild class (...
ar099968's user avatar
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This is a Delphi class, based on System.net.HTTPClient with a function for downloading a file from a URL and saving on a filename destination: ...
ar099968's user avatar
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I was inspired by @LU RD's answer to the question: Using VCL TTimer in Delphi console application, and wrote a bit simplified TTimerThread class. By simplified I ...
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I'm writing a communications library for a class. Part of the requirements is that semi-reliable communications, which leads me to this monstrosity: ...
Greg's user avatar
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This Delphi (Seattle 10) routine resizes a JPG image if one of its sizes is larger than AMaxDimension pixels, and gives it a compression factor of ...
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I've written a procedure which allows serialized writing of a stream. I don't in any way consider this done, but this is the beginning of it. I know there are other implementations out there like this,...
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1k views

In the Firemonkey framework of Delphi, there's a feature called Float Animations, which allows you to control real-time "animation" of float values. However, in the VCL framework, this feature is not ...
Jerry Dodge's user avatar
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2 votes
1 answer
2k views

I have a few columns in a DBGrid that I want to hide and show at different times depending on what the user wants to view. Rather than writing the following code; ...
Admiral Noisey Bottom's user avatar
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I'm using TurboPower LockBox for the first time, and using the TwoFish algorithm to first encrypt a password, and later retrieve the password by decrypting the generated hash. I would like to know ...
Steve F's user avatar
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I have this code and at the end of it, FastMM shows that there were memory leaks with all the objects of TSinc: ...
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The Win32 API has a so-called 'high performance counter' (QueryPerformanceCounter() and friends) but often it is neither precise enough nor reliable enough, due to ...
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9 votes
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I have developed small test project as a template for production project. In this template I've found a way that the application saves and loads its own settings (ini-file). Main Form1 will contain ...
Gordon Freeman's user avatar
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5 votes
1 answer
548 views

I've written an object which allows parsing and serializing a command line. I don't in any way consider this done, but this is the beginning of it. I know there are other implementations out there ...
Jerry Dodge's user avatar
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3 votes
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For some purposes it can be highly desirable to use GetSystemTimePreciseAsFileTime() whenever it is available (i.e. Windows 8+) because the accuracy of ...
DarthGizka's user avatar
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2 votes
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I have developed this function but I'm not sure if this is the best (secure) way to write in resources without corrupt *.exe in case of fails. What is the best way to write resources to a *.exe file? ...
ar099968's user avatar
  • 201
3 votes
1 answer
965 views

This is a code written is Pascal (Delphi). It asks the user to think of a number between min_ and max_ and then guesses the ...
Tim's user avatar
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2 votes
1 answer
2k views

I have an action on four buttons. I need to make a down (checked) button if it's pressed and other buttons up (unchecked). My button is TToolButton and the property ...
Roman Marusyk's user avatar
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4 votes
2 answers
2k views

As part of processing card payments, before even attempting to process, I need to check and validate the card number to make sure it's valid. For this, I've encapsulated this validation in a record ...
Jerry Dodge's user avatar
  • 659
4 votes
1 answer
214 views

With Delphi 7 I need to create a TStream variable and use/free it in another part of the code. Unfortunately it cannot be passed as "normal" parameter. I created a ...
Guybrush's user avatar
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5 votes
1 answer
483 views

I'd like to know if I translated a piece of code correctly from C++ to Delphi. It looks like it is working, but I have a feeling that I'm reading and writing into memory that I'm not supposed to using ...
Stefan Badenhorst's user avatar
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2 answers
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I'm doing a program in Delphi, writing in all kinds of files, either text or executable: ...
Matt Olsen's user avatar
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635 views

I have created this unit containing a class derived from TXmlIniFile. This class uses the common TCustomInifile methods to write to and read from an XML file. It comes from an idea of Chris Rolliston ...
user1580348's user avatar
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1 answer
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The following pascal function (compiled with Delphi) will split strings. It works perfectly, but how to improve the code? For example, to avoid using the repeat-until loop. ...
Matt Olsen's user avatar
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3 votes
1 answer
3k views

I've just finished this function and wanted to know if anyone know another way to do the same: ...
Matt Olsen's user avatar
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2 votes
0 answers
740 views

I've put together a function in Delphi XE7 which returns the Dropbox directory path on my machine, as this path can be customized by the user. This function currently works on my computer, but it ...
user1580348's user avatar
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3 votes
0 answers
127 views

I am reading the "Clean Code" book and trying refactoring my source code according to the principles "single level of abstraction"/"separation of concerns". How would you refactor the following code? ...
Ruben's user avatar
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4 votes
2 answers
9k views

I wrote a record which encapsulates conversion of colors between TColor, RGB values, CMYK ...
Jerry Dodge's user avatar
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4 votes
1 answer
453 views

I am currently working on a little binary patcher. My current code works fine but I do want my code to be optimized (fast) and as clean as possible. Could you all please help me review this? IDE: ...
Xor-el's user avatar
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3 votes
1 answer
105 views

The user enters coefficients into input boxes on a form, called GetFunction. Upon clicking an OK button on said form, the input is validated using ...
Gigabit's user avatar
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2 votes
0 answers
3k views

I'm a newbie in Delphi and I'm trying to create a client/server application using INDY. I want to have a server that is capable not only of receiving messages and streaming, but also sending data to ...
SkynetAdmin's user avatar
  • 21
6 votes
2 answers
1k views

I have written this function for the sole purpose to get a similar color either brighter or darker than any given color, depending on an average lightness/darkness. Essentially, I add up the R/G/B ...
Jerry Dodge's user avatar
  • 659
5 votes
1 answer
820 views

I've created a MiniStack to assist in removing recursion from routines using a manual stack. Obviously if the stack is an object it lives on the heap and its ...
Johan's user avatar
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8 votes
1 answer
320 views

I've translated this Java code into Delphi code: ...
Johan's user avatar
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24 votes
1 answer
2k views

I wrote a small component (still in the works but working) which takes a large SQL script file, splits it into different "blocks" based on GO statements, and executes them one by one. The only major ...
Jerry Dodge's user avatar
  • 659
7 votes
1 answer
445 views

I have produced a working menu component for a project I'm working on, but would like to reduce the amount of code used and improve the methods - especially in the Paint implementation - still further,...
Funk247's user avatar
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