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Delphi High Performance

You're reading from   Delphi High Performance Build fast Delphi applications using concurrency, parallel programming and memory management

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Product type Paperback
Published in Feb 2018
Publisher Packt
ISBN-13 9781788625456
Length 336 pages
Edition 1st Edition
Languages
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Author (1):
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Primož Gabrijelčič Primož Gabrijelčič
Author Profile Icon Primož Gabrijelčič
Primož Gabrijelčič
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Toc

Table of Contents (11) Chapters Close

Preface 1. About Performance FREE CHAPTER 2. Fixing the Algorithm 3. Fine-Tuning the Code 4. Memory Management 5. Getting Started with the Parallel World 6. Working with Parallel Tools 7. Exploring Parallel Practices 8. Using External Libraries 9. Best Practices 10. Other Books You May Enjoy

Dynamic record allocation

While it is very simple to dynamically create new objects—you just call the Create constructor—dynamic allocation of records and other data types (arrays, strings ...) is a bit more complicated.

In the previous section, we saw that the preferred way of allocating such variables is with the New method. The InitializeFinalize demo shows how this is done in practice.

The code will dynamically allocate a variable of type TRecord. To do that, we need a pointer variable, pointing to TRecord. The cleanest way to do that is to declare a new type PRecord = ^TRecord:

type
TRecord = record
s1, s2, s3, s4: string;
end;
PRecord = ^TRecord;

Now, we can just declare a variable of type PRecord and call New on that variable. After that, we can use the rec variable as if it was a normal record and not a pointer. Technically, we would have to always...

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