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Content Count
3586 -
Joined
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Last visited
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176
Everything posted by David Heffernan
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Using TFileStream to check if file is in use
David Heffernan replied to Patrick Hughes's topic in Algorithms, Data Structures and Class Design
What I can't understand is why you would ever need to call such a function. Broadly, you never ask if a file is in use an any one moment. You try to do something with a file, and then handle the scenario that it fails due to being open. -
Difference between Pred and -1
David Heffernan replied to John Kouraklis's topic in RTL and Delphi Object Pascal
That doesn't make a lot of sense. What is the successor of a collection. Perhaps you mean the successor of a member of a collection. But that only makes sense in the context of the collection. -
Difference between Pred and -1
David Heffernan replied to John Kouraklis's topic in RTL and Delphi Object Pascal
For an array indexed access is usually fastest. Delphi RTL enumerators are often sub optimal. I mean, heap allocation to iterate a collection ffs. -
Is a standard comment before each procedure implementation useful?
David Heffernan replied to dummzeuch's topic in GExperts
> Is a standard comment before each procedure implementation useful? No -
Difference between Pred and -1
David Heffernan replied to John Kouraklis's topic in RTL and Delphi Object Pascal
High is fine for an array. Pred is a stupid way to write Count - 1. I mean, you aren't proposing writing Pred(Length(arr)) are you. -
Difference between Pred and -1
David Heffernan replied to John Kouraklis's topic in RTL and Delphi Object Pascal
No. It's pointless verbiage. Use List.Count - 1 -
Difference between Pred and -1
David Heffernan replied to John Kouraklis's topic in RTL and Delphi Object Pascal
The difference is that Pred(...) is verbose and opaque. -
That's true type not open type
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Find a C API and convert the header file.
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Find record operators via Rtti?
David Heffernan replied to Vincent Parrett's topic in RTL and Delphi Object Pascal
I think it has a name something like &op_Equality. You should be able to enumerate the methods of the type. -
If that code would compile, then there wouldn't be much point in having the library. Think about what the literal on the rhs of the assignment actually is.
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I doubt anyone wants to download your software. I know I don't. Normally if you want help you'd explain more what the problem is. Anyway, never mind.
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I'm afraid that none of this makes a lot of sense. Why do you feel that there should only be one explorer process? Why does that matter?
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It's common to have lots of explorer processes. There's an option that means each window is run from a different process. I can't understand why you would feel that there should only be a single explorer process. That's for the system to decide. If you want to interact with the system then you need to follow its rules. You don't make the system rules.
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Of course not. You aren't generating the html.
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How are you generating the original html?
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Problems running in 64 bit mega PC
David Heffernan replied to Peter Davies's topic in OmniThreadLibrary
Yes, if it is an affinity mask then it should be NativeUInt. -
Is Class with 2 'nested' constructors bad design?
David Heffernan replied to Mike Torrettinni's topic in Algorithms, Data Structures and Class Design
Sounds like the classic OOP trap of trying to solve all problems with inheritance. Good OOP programmers hardly ever use inheritance to solve problems. -
Problems running in 64 bit mega PC
David Heffernan replied to Peter Davies's topic in OmniThreadLibrary
I mean that this thing is named as though it is an affinity mask. And on Windows that makes it pointer sized. So, NativeUInt. -
Problems running in 64 bit mega PC
David Heffernan replied to Peter Davies's topic in OmniThreadLibrary
Affinity masks for pointer sized. -
Problems running in 64 bit mega PC
David Heffernan replied to Peter Davies's topic in OmniThreadLibrary
Don't try to use more than 48 threads in that case -
If the hacker gets the program, and there is a hard coded key in the program, then it's trivial to hack.
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Problems running in 64 bit mega PC
David Heffernan replied to Peter Davies's topic in OmniThreadLibrary
Is it 96 cpus, or 48 with 2 threads per core? Is the memory NUMA? -
Is Record method solution or a bad hack for pointer fields?
David Heffernan replied to Mike Torrettinni's topic in Algorithms, Data Structures and Class Design
What do you think this does? -
Seems like it's not really worthwhile then....