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Delphi Cookbook

You're reading from   Delphi Cookbook 50 hands-on recipes to master the power of Delphi for cross-platform and mobile development on Windows, Mac OS X, Android, and iOS

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Product type Paperback
Published in Sep 2014
Publisher
ISBN-13 9781783559589
Length 328 pages
Edition 1st Edition
Languages
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Author (1):
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Daniele Teti Daniele Teti
Author Profile Icon Daniele Teti
Daniele Teti
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Toc

Table of Contents (9) Chapters Close

Preface 1. Delphi Basics FREE CHAPTER 2. Become a Delphi Language Ninja 3. Going Cross Platform with FireMonkey 4. The Thousand Faces of Multithreading 5. Putting Delphi on the Server 6. Riding the Mobile Revolution with FireMonkey 7. Using Specific Platform Features Index

Fun with anonymous methods – using higher-order functions


Since Version 2009, the Delphi language (or better, its Object Pascal dialect) supports anonymous methods. What's an anonymous method? Not surprisingly, an anonymous method is a procedure or a function that does not have an associated name.

An anonymous method treats a block of code just like a value so that it can be assigned to a variable or used as a parameter to a method or returned by a function as its result value. In addition, an anonymous method can refer to variables and bind values to the variables in the context scope in which the anonymous method is defined. Anonymous methods are similar to closures defined in other languages such as JavaScript or C#. An anonymous method is declared as a reference to a method:

type
  TFuncOfString = reference to function(S: String): String;

Anonymous methods (or anonymous functions) are convenient to pass as an argument to a higher-order function. What's a higher-order function?

Wikipedia...

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