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Everything posted by Vandrovnik
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Depth First Search vs. Breadth First Search in directories
Vandrovnik replied to dummzeuch's topic in Algorithms, Data Structures and Class Design
But TDirectory.GetFiles (System.IOUtils) internally uses FindFirst/FindNext too... -
When I had 10.2 and 10.3 on my PC and uninstalled 10.2 later, help in 10.3 stop working and must be reinstalled.
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[Android][CameraComponent] How do I get a sharp image with Autofocus or other?
Vandrovnik replied to Fabian1648's topic in FMX
Have you tried to use lower resolution and turn the light on? -
[Android][Delphi Rio] Impossible to set correctly a CameraComponent
Vandrovnik replied to Fabian1648's topic in FMX
I have seen the same problem and have "solved" it this way: Kamera.Quality := FMX.Media.TVideoCaptureQuality.LowQuality; Kamera.Quality := FMX.Media.TVideoCaptureQuality.MediumQuality; -
The declaration must be outside of the form...
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Did you read, what Cristian Peța linked? function ShutdownBlockReasonCreate(hWnd: HWND; Reason: LPCWSTR): Bool; stdcall; external user32; function ShutdownBlockReasonDestroy(hWnd: HWND): Bool; stdcall; external user32;
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Record Circular References
Vandrovnik replied to Bernard's topic in Algorithms, Data Structures and Class Design
I believe Anders is right. Class reference is just a pointer - its size is known. When you use this class as a member of another class (fChild: tChild, where tChild is a class), you cannot reference its members in properties (property x: integer read fChild.x). If fChild is a record (fChild: tChild, where tChild is a record), you can reference its members in properties, like in Anders' example (property x: integer read fChild.x). -
Record Circular References
Vandrovnik replied to Bernard's topic in Algorithms, Data Structures and Class Design
If size was the only problem, I can imagine something like this ("human preprocessor"): type tRecordA = record of size 8; tRecordB = record ... function Test: tRecordA; end; tRecordA = record x, y: integer; end; -
Record Circular References
Vandrovnik replied to Bernard's topic in Algorithms, Data Structures and Class Design
Something like a record helper 🙂 I always wonder why there can be just one class/record helper... -
Delphi Rio IDE hangs again and again
Vandrovnik replied to microtronx's topic in Delphi IDE and APIs
Or NativeInt(pointer(... or NativeUInt(pointer(... Just when I see this typecasting pointer to integer, I can't help thinking that 64 bit IDE is far away 🙂 -
Delphi Rio IDE hangs again and again
Vandrovnik replied to microtronx's topic in Delphi IDE and APIs
64 bit IDE would probably require all design time packages to be 64 bit, too... I was surprised to see typecast "integer(pointer(..." in https://blog.marcocantu.com/blog/2020-may-custom-managed-records.html ... -
Function with just underscore _() seems to be valid
Vandrovnik replied to Mike Torrettinni's topic in General Help
With this info in mind, for bad customers you can start programming like that: const _ = 1; _____ = 2; x = _____ + (_-_-_) + 0 + _+0-0+_ ; -
May be https://github.com/neslib/FastMath and/or http://docwiki.embarcadero.com/RADStudio/Rio/en/Floating_point_precision_control_(Delphi_for_x64) can help.
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Does this data structure exist? TDataStructure<TKey, TKey, TValue, TPayLoad> ?
Vandrovnik replied to PolywickStudio's topic in Algorithms, Data Structures and Class Design
tDictionary alone will not allow you to store more values for the same key (it seems you need it: "I get all values of (TKey1 = 1) for the data. "). You could use two dictionaries: tDictionary<tKey1, tObjectList> tDictionary<tKey2, tObjectList> In these object lists, there will be all objects with corresponding values of the tKey1, resp. tKey2. -
It happens to me +- once every two weeks, too.
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You mean something like this? type tSledovaniVykonuSeznamVysledku=class(tObjectList<tSledovaniVykonuVysledky>) ... var Cmp: IComparer<tSledovaniVykonuVysledky>; begin Cmp:=tDelegatedComparer<tSledovaniVykonuVysledky>.Create( function(const Left, Right: tSledovaniVykonuVysledky): Integer begin result:=CompareStr(Left.Nazev, Right.Nazev); end); Sort(Cmp);
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Thank you, AsmProfiler suites the best.
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Google Chrome is blocking the download of my application — HELP!!!
Vandrovnik replied to Steve Maughan's topic in General Help
I have just tried to download it using Chrome (Czech version 81.0.4044.122 (Oficiální sestavení) (64bitový) ), downloaded without problems, browser allowed me to start the downloaded .exe. -
What about remote debugging?
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Variant to generic T, how?
Vandrovnik replied to Jacek Laskowski's topic in RTL and Delphi Object Pascal
This compiles, but I have not tested, whether it works as expected 🙂 ToField<T> = class(tObject) private fData : T; protected procedure SetFromVariant(const aValue : Variant); end; procedure ToField<T>.SetFromVariant(const aValue: Variant); var val: TValue; begin val := TValue.FromVariant(aValue); fData := val.AsType<T>; end; -
How do you deal with deprecated symbols in backwards compatible code?
Vandrovnik replied to dummzeuch's topic in RTL and Delphi Object Pascal
Do you have an idea, how many users really need new functions for old versions of Delphi? If there are not many of them, I would suggest to drop support for old versions - you can probably spend your time better than keeping code compatible with old Delphi... -
Structure Panel empty - how to get Embarcadero support?
Vandrovnik replied to PeterPanettone's topic in Delphi IDE and APIs
Probably the same problem as in Project Window https://quality.embarcadero.com/browse/RSP-27182 It is reported, but when it will be fixed... -
What about DirectWrite? It should support OpenType fonts.
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Does AV happen on one computer, or all? Every query, or just some (with parameters? with string result? with only integer result? etc.)?