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jpluimers

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Delphi: got “EOleException with message ‘Microsoft MSXML is not installed’” in a console or test project?

jpluimers jpluimers Did you ever get this run-time error in a console or test project? EOleException with message ‘Microsoft MSXML is not installed’ It means that CoInitialize or CoInitializeEx needs to be called in the thread that… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, Software Development, Undocumented Delphi 0

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Delphi: Any idea why Delphi (At least since Seattle) does this to Dproj files:  nodes change places – Tommi Prami – Google+

jpluimers jpluimers From a while back, but still so very relevant: [WayBack] Any idea why Delphi (At least since Seattle) does this to Dproj files:  <DeployClass …> nodes change places – Tommi Prami – Google+. Luckily most of… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, Software Development 0

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When your Delphi IDE suddenly skips unsaved changes during compilation(TL;DR: watch early signs your IDE is hosed, then restart without saving)

jpluimers jpluimers A while ago, I observed that when compiling, my Delphi IDE would not take into account unsaved changes any more. This ws in a time when I was tracking down some hard to reproduce problems… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, Software Development, Undocumented Delphi 0

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Delphi object instance lifetime demo; do not use AfterConstruction as a poor-mans way to work around non-virtual constructor or undetermined Create hierarchy calls

jpluimers jpluimers I think using AfterConstruction is a poor man’s solution that you should only use in exceptional cases, as it is: called only after the last constructor in the chain is called. called outside of the… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, Software Development, Undocumented Delphi 0

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delphi – Invalid floating point operation calling Trunc() – Stack Overflow

jpluimers jpluimers I bumped into [WayBack] delphi – Invalid floating point operation calling Trunc() – Stack Overflow, while searching for what might have tests like these fail: TValueRecordTests.Int64_Through_Value_Container_via_Currency_Intermediate_Is_Identity_Operation(9223372036854775807) = 9223372036854775807 EInvalidOp with message ‘Invalid floating point operation’… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, Event, Software Development 0

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A DUnit Folder Iterator Extension – The Art of Delphi Programming

jpluimers jpluimers Reminder to self: experiment with [WayBack] A DUnit Folder Iterator Extension – The Art of Delphi Programming. This could be extended to virtual folders, allowing many integration tests to be run depending on some configuration… … Read more 4 years ago in Conference Topics, Conferences, Delphi, Development, DUnit, Event, Software Development, Unit Testing 0

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Debouncing and Throttling Explained Through Examples | CSS-Tricks

jpluimers jpluimers TL;DR of https://css-tricks.com/debouncing-throttling-explained-examples/: debounce: Grouping a sudden burst of events (like keystrokes) into a single one. throttle: Guaranteeing a constant flow of executions every X milliseconds. Like checking every 200ms your scroll position to trigger a CSS animation…. … Read more 4 years ago in algorithms, Delphi, Development, JavaScript/ECMAScript, Scripting, Software Development 0

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MESSAGE directive Delphi

jpluimers jpluimers I totally forgot to queue this, after putting in a draft in 2010. Luckily, nothing has changed since then: the [WayBack] MESSAGE directive Delphi which allows you to emit hint, warning, error (multiple) and fatal… … Read more 4 years ago in Delphi, Development, Software Development 0

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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