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Everything posted by Lars Fosdal
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Exception classes implementing interfaces
Lars Fosdal replied to Wagner Landgraf's topic in RTL and Delphi Object Pascal
With EurekaLog, it is possible to capture and log EVERY exception before it is handled, so why bother with interfaces? We use inheritance, mostly to classify exceptions for a sub-domain. Exception - ParsingException - InvalidCSV - InvalidEmptyField try Parse; except on E:Excepetion do if E is ParsingException then LogSomethingInformative else raise. end; -
Any problem can be expanded into something insurmountable if one so likes. But, if you apply the KISS and Pareto rules- you can at least start out with a less complicated scenario.
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Pretty much. Add corner cases as they happen.
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Just from the top of my head... 3 + -3 3 + - 3 3 +- 3 - 3 + 3 -3+3 -3 + +3 How tolerant do you want the parser to be? I wrote a parser that did math on arrays in a stock price technical analysis tool back in the 90's. I built the parser so that it generated an expression tree, so the same calculation could be done rapidly on a number of data points. I could multiply a stock price with a currency price and subtract the adjusted value from the Oslo exchange with the same listed stock on NYSE. Good fun!
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It depends on the parser. Sometimes it can be just "can this string be recognized as a valid representation of a value?", other times you could parse a generated artifact, or a predefined artifact.
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It would be natural that the test cases also contain negative tests - i.e. stuff that is supposed to fail. Only testing happy path = recipe for disaster. You want to know that if you get garbage in, at least your code can recognize that it is garbage, report the problem, and move on.
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Dictionary and anonymous methods. Link the method to the keyword. Look up via the keyword and execute the code.
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The X is for eXcellent 🙂 Edit: On the serious side, we chose DUnitX because the use of attributes allowed us to do more testing with less code. Also, it is super easy to integrate with Continua CI. Many of the tests are there to verify that we f.x. have working FromString/ToString methods for all our enumerated types, validation of algorithms, and such - but a lot of the tests are actually closer to integration tests than to unit tests. F.x. there are a large number of tests that do CRUD testing for our database objects. We should add more tests, to be honest - but so much to do, so little time, so the Pareto rule, rules.
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Patch for Delphi 11 Alexandria available
Lars Fosdal replied to PeterPanettone's topic in Delphi IDE and APIs
All our apps, including our services, are self-upgrading/restarting. It has worked flawlessly for years. We set up the relaunch to be executed in the finalize statement of our upgrader unit, so we know the application has actually exited when we relaunch. -
Patch for Delphi 11 Alexandria available
Lars Fosdal replied to PeterPanettone's topic in Delphi IDE and APIs
I just installed FMXLinux 1.68 which required a restart. No lingering BDS.exes for me. I keep Process Hacker running most of the time, and I can't recall seeing multiple BDS processes after a GetIt install. -
How about testing for 'FOR SELECT' first? Then again - what if there are two spaces between FOR and SELECT ? If you want to "trim" all spaces, you still have to avoid doing so inside string literals. Parsing can be complicated. I hope you don't plan to expose this to users, because they could wreak havoc on your database.
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Patch for Delphi 11 Alexandria available
Lars Fosdal replied to PeterPanettone's topic in Delphi IDE and APIs
I haven't seen a GetIt induced restart fail yet - but now I am suddenly expecting it to fail... -
It has been too long since the last "Clan of Kahn" "Sons of Kahn" post 🙂
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The Register is definitively one of the more interesting and accurate sites on all things IT these days. Very little fluff and rumors. Edit: Here is the "wrong thing" article: https://www.theregister.com/2021/10/22/microsoft_net_hot_reload_visual_studio/ Also, the BOFH posts usually are good for a laugh and a nod.
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The "wrong thing" was to first introduce it to the open source libs, then pull it back - instead of keeping it private, and adding it to the open source lib later.
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Most of my code involves a multitude of objects in various containers and their interactions. I've never dragged the exe pointer or set the execution point during debugging, as it would most likely create conflicting data.
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It would be a nice feature, but it is pretty unlikely to ever happen. The .NET platform is very, very different from Win32 on Intel. The ancient Borland Pascal DOS debugger had backstep, where you could single-step backwards from a breakpoint. Also not quite as easy in the multithreaded, asynchronous world of Windows.
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RAD Studio 11 Alexandria Patch 1 Available
Lars Fosdal replied to Uwe Raabe's topic in Tips / Blogs / Tutorials / Videos
They could have made the "Patch available" a little more prominent, as well as putting it in the "New in GetIt" and "Promoted in GetIt" panes. -
CharInSet revisited (again)
Lars Fosdal replied to pyscripter's topic in RTL and Delphi Object Pascal
If the values are in an int array, would it be possible to use a different kind of operation than a loop + comparison, f.x. the SIMD instructions? -
Delphi 11.0 has a different form Caption offset than Delphi 10.4
Lars Fosdal replied to Tom Mueller's topic in VCL
Mostly, yes. -
Delphi 11.0 has a different form Caption offset than Delphi 10.4
Lars Fosdal replied to Tom Mueller's topic in VCL
It's a nightmare when you have 350+ frames and forms that may need a touch-up, and you still can't be sure they won't be f'd up if two people with different DPI settings edit them. -
CharInSet revisited (again)
Lars Fosdal replied to pyscripter's topic in RTL and Delphi Object Pascal
@pyscripter - A char in a Unicode string is a word, not a byte. The old set operator is useless for Scandinavian chars, as well as German umlauts, etc., unless you convert to ANSI - and that is not desirable. -
CharInSet revisited (again)
Lars Fosdal replied to pyscripter's topic in RTL and Delphi Object Pascal
That is what I meant, and you are right - how could it... -
CharInSet revisited (again)
Lars Fosdal replied to pyscripter's topic in RTL and Delphi Object Pascal
Does CharInSet support multi-byte Unicode characters? -
UAC request minimized instead of full-screen
Lars Fosdal replied to Silver Black's topic in Windows API
I see minimized / background UAC dialogs from time to time, and it is annoying as heck. I can't really see a pattern, though - and I can't say 100% for sure, but I don't think our own app that requires elevation have behaved like this for me. Mostly, it seems to be installers, or apps launched by installers?