Story Category: Development

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Short Delphi tip: ensuring RTTI for classes is included

jpluimers jpluimers When using RTTI in Delphi, you really want the RTTI to be available. The compiler includes RTTI for classes, as soon as it found that a class is touched by code that will be executed…. … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, Software Development, Undocumented Delphi 0

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Delphi: combining intrinsic functions and inline to have no-code checks on concrete generic instantiation

jpluimers jpluimers The title might sound like a lot of gibberish, but the mechanism it describes helps solving a problem when using generics: lack of generic constraints in the compiler. For instance, you cannot constrain on enumeration… … Read more 4 years ago in Delphi, Development, Software Development 0

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Delphi: quickly failing in use-after free scenarios

jpluimers jpluimers Two tricks that can help in use-after-free scenarios. Call ScanMemoryPoolForCorruptions often One of the scenarios of use after free, is that memory blocks get corrupted. FastMM4 normall checks this at process end using the CheckBlocksOnShutdown… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, FastMM, Software Development, Undocumented Delphi 0

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Delphi XE7 introduced const support for dynamic arrays; prior versions used [] only for sets.

jpluimers jpluimers A few things to learn from [WayBack] delphi – Constant array of cardinal produces error ‘Constant expression violates subrange bounds” – Stack Overflow: Delphi XE7 introduced compiler support for const dynamic arrays. Compiler errors can completely… … Read more 4 years ago in Delphi, Development, History, Software Development, Undocumented Delphi 0

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Automatically closing ABBY Finereader 5.0 windows after scanning is completed

jpluimers jpluimers Both my Fujitsu ScanSnap ix500 and ix100 scanners can be used from Windows to automatically scan to PDF. PDF conversion is done through the included ABBYY FineReader 5.0 software. However, on each scan, it keeps… … Read more 4 years ago in Delphi, Development, Fujitsu ScanSnap, Hardware, ix100, ix500, Power User, Scanners, Software Development, Windows Development 0

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Delphi intrinsic functions that evaluate to consts

jpluimers jpluimers A long time ago, I wondered Are these really Windows compiler unsupported Delphi Intrinsic Routines about [WayBack/Archive.is] Delphi Intrinsic Routines – RAD Studio. Today, I limited the documented intrinsic list to the constant intrinsic functions: const… … Read more 4 years ago in Delphi, Development, Software Development, Undocumented Delphi 0

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Delphi: not all lists need to be generic

jpluimers jpluimers Lots of Delphi programmers made, or are making the move, of classic Delphi based containers like TObjectList into generic containers like TList<T>. A while ago, I got into a project that needed to extend lifetime… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, Software Development 0

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DUnit testing code that should raise a specific exception

jpluimers jpluimers A while back, I was writing some code to demonstrate a few inner workings of TInterfacedObject, interface reference counting and mixing object references with interface references. One way to show this is through a test… … Read more 4 years ago in agile, Conference Topics, Conferences, Delphi, Development, Event, Software Development, Unit Testing 0

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F2084 Internal Error: MA1263 – no relevant results

jpluimers jpluimers I tried searching for F2084 Internal Error: MA1263 – Google Search which happened on a complete up to date Delphi 10.1 Berlin installation. It came from a large unit testing application using truckloads of generic language constructs,… … Read more 4 years ago in Delphi, Delphi 10.1 Berlin (BigBen), Development, Software Development 0

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The Delphi interface reference counting compiler bug that will never get fixed as it is marked “as designed”

jpluimers jpluimers A long time ago, I write a question [WayBack] delphi – Should the compiler hint/warn when passing object instances directly as const interface parameters? – Stack Overflow in 2010. It was marked by (now former) compiler… … Read more 4 years ago in Delphi, Development, Software Development 0

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How do I pretty-print JSON in Delphi? – Stack Overflow

jpluimers jpluimers For my archive: the [WayBack] How do I pretty-print JSON in Delphi? – Stack Overflow answer by [WayBack] Bob: If you do not want to use any external library, and you’re using a Delphi XE5 or… … Read more 4 years ago in Delphi, Development, JavaScript/ECMAScript, JSON, Scripting, Software Development 0