Month: November 2008
String reverse tests
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This post will be a short one. Just giving a general recommendation for people doing String processing in Delphi – use PChar or ^Char for that. I have made a simple test program that reverses a very big…
Read More »Strings, PChars and reference counting
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Hi folks, in today’s post I will continue with reference counting specifics of Delphi in the particular case of Strings. We’ll start with a small example: What will the output of this program be? The obvious result (the…
Read More »C++ Builder TypeInfo alternative.
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I bet most Delphi developers know about TypeInfo operator. It provides type information somehow similar to reflection in Java or .NET (of course a lot more limited). Take this simple example: It will simply write “Byte” on the…
Read More »That stupid garbage collector
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I’ve heard this phrase a few times in regards to Delphi’s reference counting mechanics. Before continuing with this post please note — Delphi doesn’t have a Garbage Collector (as Java or .NET)! It uses Reference Counting as part…
Read More »Delphi 2009: reference to
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It’s probably not news anymore but Delphi 2009 supports anonymous methods out of the box. To be able to support them, CodeGear developers added a new type of a “pointer to a method” called a managed method reference:…
Read More »Generics.Defaults: Bug
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There is a bug in Generics.Defaults unit in Delphi 2009. If you read my previous post: Generic Defaults you should know already about the “3 bytes long” data types and how are those passed as const parameters to…
Read More »Generic Defaults
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One important part of any generic collection classes are the “type support” functions. And what I mean are the functions specific to each type that perform: Comparison – will return a value indicating if A > B or…
Read More »Delphi 2009 – Exit;
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A very useful and cool feature in Delphi 2009 is the Exit keyword. Yes, it’s that Exit that “returns” from a function call. So what’s so exiting about it? Nothing really – for people coming from C-like languages,…
Read More »Delphi Generics: Problem 1
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Kids, don’t try this at home 🙂 Error: [DCC Fatal Error] Tests.DynamicArray.pas(772): F2084 Internal Error: URW1135 There you have it 🙂 The fix is rather simple but annoying: Declare a new type in the class/record like this: And…
Read More »TSendMail Action
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If you’ve ever wondered how to use TSendMail action in ExtActns unit – drop it, it’s useless. I’ve had a few people complaining they don’t know how to set the Recipients and Subject set it – you can’t…
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