Kryvich

@David Heffernan This is evident not only in the debugger, but also at runtime. That's the question. Processor - AMD Ryzen 5 3600.

@DelphiUdIT That's good! I have the community edition, its version is 29.0.51961.7529, Delphi 12 Update 1.

Something went wrong with system functions Int and Frac in Delphi 12, Win32 platform.

At runtime, the result of the expression Frac(1.9) can be either 0.9 (as expected) or 0 or 0.89. I couldn't determine what affects this.

Interestingly, in the Evaluate/Modify window, the expressions Frac(1.9) and Int(1.9) always return -NAN, whatever that means.

Has anyone encountered these issues?

As a temporary workaround, I used x-Trunc(x) instead of Frac(x).

Kryvich's Delphi Reporter - Simple reporting tool with templates in RTF, Word XML, Excel XML, 

HTML, plain text formats. For basic reports without images, charts, with a simple structure.

@Squall_FF8

DataModule.LookupDatasetField1.DisplayWidth := 10;

DataModule.LookupDatasetField2.DisplayWidth := 20;

DataModule.LookupDatasetField3.DisplayWidth := 30;

You need to set the DisplayWidth property for the list fields of the list lookup dataset.

Quote

is there a way to put a header on columns?

AFAIK no.

1 hour ago, David Heffernan said:

I know how to code a solution. And I'd use a proper parser to do it. But I'm looking for a tool. 

Definitely. But time is money. If Copilot can do it for you - why not?

1 hour ago, David Heffernan said:

Doesn't look like it handles code laid out over multiple lines. 

for Line in Lines do   -->  Line := Lines.Text;

Copilot.

Quote

Write a console utility in Delphi that will scan the specified folder with subfolders, open files with the PAS extension, and select all strings starting with "Format(" and ending with "])". Among the strings found, you need to select those that contain the "+" character before the "," character, and save these strings in the text file "format.log".

The result:

program FormatStringExtractor;

uses
  SysUtils, Classes;

function ContainsPlusBeforeComma(const S: string): Boolean;
var
  PlusPos, CommaPos: Integer;
begin
  PlusPos := Pos('+', S);
  CommaPos := Pos(',', S);
  Result := (PlusPos > 0) and (CommaPos > PlusPos);
end;

procedure ProcessFile(const FileName: string; LogFile: TStrings);
var
  Lines: TStringList;
  Line, SubStr: string;
  StartPos, EndPos: Integer;
begin
  Lines := TStringList.Create;
  try
    Lines.LoadFromFile(FileName);
    for Line in Lines do
    begin
      StartPos := Pos('Format(', Line);
      while StartPos > 0 do
      begin
        EndPos := PosEx('])', Line, StartPos);
        if EndPos > 0 then
        begin
          SubStr := Copy(Line, StartPos, EndPos - StartPos + 2);
          if ContainsPlusBeforeComma(SubStr) then
            LogFile.Add(SubStr);
          // Move the start position forward to find the next occurrence
          StartPos := PosEx('Format(', Line, EndPos + 2);
        end
        else
          Break;
      end;
    end;
  finally
    Lines.Free;
  end;
end;

procedure ProcessFolder(const Folder: string; LogFile: TStrings);
var
  SearchRec: TSearchRec;
  FullPath: string;
begin
  if FindFirst(Folder + '\*.*', faAnyFile, SearchRec) = 0 then
  begin
    repeat
      FullPath := Folder + '\' + SearchRec.Name;
      if (SearchRec.Attr and faDirectory) = faDirectory then
      begin
        if (SearchRec.Name <> '.') and (SearchRec.Name <> '..') then
          ProcessFolder(FullPath, LogFile);
      end
      else if ExtractFileExt(SearchRec.Name).ToLower = '.pas' then
      begin
        ProcessFile(FullPath, LogFile);
      end;
    until FindNext(SearchRec) <> 0;
    FindClose(SearchRec);
  end;
end;

var
  Folder: string;
  LogFile: TStringList;
begin
  Write('Enter folder path to scan: ');
  ReadLn(Folder);

  LogFile := TStringList.Create;
  try
    ProcessFolder(Folder, LogFile);
    LogFile.SaveToFile('format.log');
    WriteLn('Strings saved to format.log');
  finally
    LogFile.Free;
  end;
end.

Quote

we have a C++ library statically linked to a Delphi application on Windows

Can you please elaborate this? Maybe a short article on this topic.

P.S. I've noticed that there have been several interesting Delphi projects from Brazilian developers lately. Skia for Delphi, D2Bridge Framework are the most notable.

16 hours ago, David Heffernan said:

I went from XE7 to 11.something and only upgraded to get high DPI support which was worth it. Not sure what would get me excited from here. 

 

Probably would be copilot like goodness in the IDE. 

Multiline strings '''...''' were a very nice addition to the language. Still waiting for constructions like

• case string1 of 'aaa':...
• DoubleValue := Variant1 if not VarIsNull(Variant1) else 0.0;

There are three things you can watch forever: fire, water, and code improving.

procedure TLinkMemo.CNCommand(var Message: TWMCommand);
begin
  inherited;
  case Message.NotifyCode of
    EN_VSCROLL: SyncLink(True);
    EN_HSCROLL: SyncLink(False);
  end;
end;

procedure TLinkMemo.SyncLink(Vertical: Boolean);
const
  BAR_FLAGS: array[Boolean] of Integer = (SB_HORZ, SB_VERT);
  MSGS: array[Boolean] of Cardinal = (WM_HSCROLL, WM_VSCROLL);
var
  scrollInfo: TScrollInfo;
begin
  if LinkedMemo = nil then
    Exit;
  var savedLink := LinkedMemo.LinkedMemo;
  try
    LinkedMemo.LinkedMemo := nil;
    scrollInfo.cbSize := SizeOf(scrollInfo);
    scrollInfo.fMask  := SIF_POS;
    if GetScrollInfo(Handle, BAR_FLAGS[Vertical], scrollInfo) then
      LinkedMemo.Perform(MSGS[Vertical], MAKEWPARAM(SB_THUMBPOSITION,
        scrollInfo.nPos), 0);
  finally
    LinkedMemo.LinkedMemo := savedLink;
  end;
end;

procedure TLinkMemo.WMHScroll(var Message: TMessage);
begin
  inherited;
  SyncLink(False);
end;

procedure TLinkMemo.WMVScroll(var Message: TMessage);
begin
  inherited;
  SyncLink(True);
end;

Quote

...very old languages are sneaking into the TIOBE index top 20.

• 1. Python -- First appeared 20 February 1991; 34 years ago
• 2. C++ -- First appeared    1985; 40 years ago
• 3. Java -- First appeared    May 23, 1995; 29 years ago
• 4. С -- First appeared    1972; 53 years ago
• ...
• 10. Delphi -- Initial release    1995

Attention! Dinosaurs have won prizes!

@limelect How do you scroll horizontally?

I know some programs allow this by holding the shift key down while you operate the scroll wheel. But in our case it doesn't work.

I can scroll horizontally by dragging the bottom slider on the scroll bar, or by moving the cursor to the end of the line with the keys.

OK I checked my code on Windows 7 in VirtualBox. Works like a charm.

@limelect It's strange. Works fine for me on Windows 10. (Screencast attached).

OK, my take.

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants,
  System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs,
  Vcl.StdCtrls;

type
  TLinkMemo = class(TMemo)
  private
    FLinkedMemo: TLinkMemo;
    procedure SyncLink;
  protected
    procedure WndProc(var Message: TMessage); override;
  public
    property LinkedMemo: TLinkMemo read FLinkedMemo write FLinkedMemo;
  end;

  TMemo = class(TLinkMemo);

  TForm1 = class(TForm)
    Memo1: TMemo;
    Memo2: TMemo;
    procedure FormCreate(Sender: TObject);
  private
  public
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TLinkMemo.WndProc(var Message: TMessage);
begin
  inherited;
  if (LinkedMemo = nil)
    or not LinkedMemo.HandleAllocated
  then
    Exit;
  case Message.Msg of
    WM_HSCROLL, WM_VSCROLL, WM_KEYDOWN, WM_MOUSEFIRST..WM_MOUSELAST: SyncLink;
  end;
end;

procedure TLinkMemo.SyncLink;

  procedure UpdateScrollBar(BarFlag: Integer; Msg: Cardinal);
  var
    scrollInfo: TScrollInfo;
  begin
    scrollInfo.cbSize := SizeOf(scrollInfo);
    scrollInfo.fMask  := SIF_POS;
    if GetScrollInfo(Handle, BarFlag, scrollInfo) then
      LinkedMemo.Perform(Msg, MAKEWPARAM(SB_THUMBPOSITION, scrollInfo.nPos), 0);
  end;

var
  savedLink: TLinkMemo;
begin
  savedLink := LinkedMemo.LinkedMemo;
  try
    LinkedMemo.LinkedMemo := nil;
    UpdateScrollBar(SB_HORZ, WM_HSCROLL);
    UpdateScrollBar(SB_VERT, WM_VSCROLL);
  finally
    LinkedMemo.LinkedMemo := savedLink;
  end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Memo1.LinkedMemo := Memo2;
  Memo2.LinkedMemo := Memo1;
end;

end.

@limelect I guess you've over-engineered it a bit. @Uwe Raabe gave a great variant, it just needs a bit of tweaking.

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants,
  System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs,
  Vcl.StdCtrls;

type
  TLinkMemo = class(TMemo)
  private
    FLinkedMemo: TLinkMemo;
    procedure WMVScroll(var Message: TMessage); message WM_VSCROLL;
    procedure WMHScroll(var Message: TMessage); message WM_HSCROLL;
    procedure CNCommand(var Message: TWMCommand); message CN_COMMAND;
    procedure SyncLink;
  public
    property LinkedMemo: TLinkMemo read FLinkedMemo write FLinkedMemo;
  end;

  TMemo = class(TLinkMemo);

  TForm1 = class(TForm)
    Memo1: TMemo;
    Memo2: TMemo;
    procedure FormCreate(Sender: TObject);
  private
  public
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TLinkMemo.SyncLink;
var
  savedLink: TLinkMemo;
  myLine, linkLine: Integer;
begin
  if LinkedMemo = nil then
    Exit;
  savedLink := LinkedMemo.LinkedMemo;
  try
    LinkedMemo.LinkedMemo := nil;
    LinkedMemo.CaretPos := CaretPos;
    LinkedMemo.Perform(EM_SCROLLCARET, 0, 0);
    myLine := Perform(EM_GETFIRSTVISIBLELINE, 0, 0);
    linkLine := LinkedMemo.Perform(EM_GETFIRSTVISIBLELINE, 0, 0);
    if myLine <> linkLine then
      LinkedMemo.Perform(EM_LINESCROLL, 0, myLine - linkLine);
  finally
    LinkedMemo.LinkedMemo := savedLink;
  end;
end;

procedure TLinkMemo.CNCommand(var Message: TWMCommand);
begin
  inherited;
  if (Message.NotifyCode = EN_VSCROLL)
    or (Message.NotifyCode = EN_HSCROLL)
  then
    SyncLink;
end;

procedure TLinkMemo.WMVScroll(var Message: TMessage);
begin
  inherited;
  SyncLink;
end;

procedure TLinkMemo.WMHScroll(var Message: TMessage);
begin
  inherited;
  SyncLink;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Memo1.LinkedMemo := Memo2;
  Memo2.LinkedMemo := Memo1;
end;

end.

@Uwe Raabe I hope the original author (notme) of the snippet has already done this. I've posted it here as a curious fact for those interested (like me). I haven't encountered any internal compiler errors in Delphi in recent years.

Although, perhaps this bug has already been fixed in 12.2. (I have 12.1 CE).

@Lars Fosdal Meaningless synthetic code. For the compiler developers, to fix an internal error. If they visit this forum.

Although this information may not help you, it can help us (Embarcadero) track down the problem if and when you report the error.

Never seen such error in Delphi 12, until today:

[dcc32 Fatal Error] CompilerError.dpr(17): F2084 Internal Error: GPFC0000094-152D5B90(15290000)-0

100% repeatability.

program CompilerError;

{$pointermath on}

type
  PRec = ^TRec;
  TRec = record
  end;
  PArr = ^Arr;
  Arr = array [0..0] of TRec;

var
  P: Pointer;

begin
  P:=@PArr(P)[0];
  P:=@PRec(P)[0];
end.

(C) notme

@Anders Melander Of course, I wrote about specifying short identifiers like Integer, PByteArray without a namespace inside a code section.

Is there anyone here who writes System.Integer, Data.Win.ADODB.TADOQuery etc. in your code? And why?

And the second question: if you don't do this for identifiers in your code, then why do it in the uses clause for system unit names?

1 hour ago, Anders Melander said:

Huh? How do they do that?

Can you give an example?

I mean, you don't have to remember which system unit declares which type. You just write Integer, PByteArray instead of System.Integer, System.Sysutils.PByteArray and that's it!

It makes sense to specify a namespace for System/RTL identifiers only in case of ambiguity.

19 hours ago, David Heffernan said:

This code would be much better if each check of file header was done with same same code, against a signature declared either in a constant, or maybe in a file that was linked as a resource. This would make the code much cleaner, without so much repetition, and would allow you to extend it very easily. 

Get paid by the number of lines? (Just kidding)

Embarcadero can sometimes move system types and functions from one RTL unit to another. Should we care in which specific RTL module a particular system type is declared? The Unit Scope Names setting helps abstract away implementation details.

As a note: I am currently researching LLMs and how to apply them to Delphi programming. This type of question AI like free Copilot answers quite well.

If you have experience with CAI NEURAL API, you can help me.

I need to create and train a neural network in Delphi like in TensorFlow, using the linear regression method::

import tensorflow as tf
from tensorflow.keras.models import Sequential
from tensorflow.keras.layers import Dense

# Model Definition
model = Sequential()
model.add(Dense(64, input_dim=14, activation='relu'))  # Input layer + first hidden layer
model.add(Dense(128, activation='relu'))               # Second hidden layer
model.add(Dense(64, activation='relu'))                # Third Hidden Layer
model.add(Dense(46, activation='linear'))              # Output layer

# Compiling the model
model.compile(optimizer='adam', loss='mean_squared_error')

# Train the model ( X_train and y_train - training data)
model.fit(X_train, y_train, epochs=50, batch_size=10, validation_split=0.2)

# Prediction for a new order
predicted_materials = model.predict(new_order)
print(predicted_materials)

I created a CAI NEURAL API model, prepared training data, and started training.

  NN := TNNet.Create();
  NFit := TNeuralFit.Create();
  CreateWorkMatPairLists(80{%}, 10{%}, 10{%}, TrainingPairs, ValidationPairs, TestPairs);
  NN.AddLayer([
    TNNetInput.Create(WORKS_COUNT),
    TNNetFullConnectReLU.Create(64),
    TNNetFullConnectReLU.Create(128),
    TNNetFullConnectReLU.Create(64),
    TNNetFullConnectLinear.Create(MATERIALS_COUNT)
  ]);

  NFit.InitialLearningRate := 0.001;
  NFit.LearningRateDecay := 0.01;
  NFit.L2Decay := 0.00001;
  NFit.Fit(NN, TrainingPairs, ValidationPairs, TestPairs, {batchsize=}10, {epochs=}50);

But I don't know how to set up the optimizer correctly (TensorFlow uses Adam). 

And how to set the loss function - mean squared error.

Does the CAI NEURAL API have such functionality, or do I need to write it myself?