Yanniel Profile

Yanniel

Yanniel

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Multiton Design Pattern in Delphi

Yanniel Yanniel The multiton is somewhat an extension of the singleton pattern. It is referred as registry of singletons by the GOF. I don’t know for sure who appointed the name multiton: it’s an analogy derived from… … Read more 13 years ago in Creational Patterns, Delphi, Delphi Programming, Design Patterns, Object Pascal Programming, Object-Oriented Programming 0

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Dependency Injection in Delphi: a simple example

Yanniel Yanniel I want to give a fairly simple Delphi example that will expose the dependency injection pattern. No framework, no third-party library will be needed here: just plain Delphi code.I won’t dig into the different forms… … Read more 13 years ago in Delphi, Delphi Programming, Design Patterns, Object Pascal Programming, Object-Oriented Programming, programming 0

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Decorator Design Pattern in Delphi. Multiple Decorations

Yanniel Yanniel In my previous post I introduced the decorator design pattern to you. I used a fairly simple example (a silly example if you wish) in order to give you a flavour of the pattern. I… … Read more 13 years ago in Computers, Delphi, Delphi Programming, Design Patterns, Object Pascal Programming, Object-Oriented Programming, programming, Structural patterns 0

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Decorator Design Pattern in Delphi. Single decoration

Yanniel Yanniel Decorator (also referred as Wrapper) is classified by GoF as a structural pattern. Its purpose is to:“Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality.”&nb… … Read more 13 years ago in Computers, Delphi, Delphi Programming, Design Patterns, Object Pascal Programming, Object-Oriented Programming, programming, Structural patterns 0

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Anonymous Methods in Delphi

Yanniel Yanniel Under the scope of Delphi, an anonymous method is either a procedure or function that’s unattached to an identifier. In other words, anonymous methods don’t have names, which is why they are called “anonymous”.Basically, you… … Read more 13 years ago in Computers, Delphi, Delphi Programming, Object Pascal Programming, Object-Oriented Programming, programming 0

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Hide the utter "Create" constructor of TObject in Delphi

Yanniel Yanniel In Delphi, constructors can be inherited; this doesn’t happen in Java, C# and C++ for example. Furthermore, constructors in Delphi can have multiple and different names; usually they are called Create, but this is just… … Read more 13 years ago in Computers, Delphi, Delphi Programming, Object Pascal Programming, Object-Oriented Programming, programming 0

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My contributions to the Delphi community at RosettaCode

Yanniel Yanniel RosettaCode is a wiki site that gathers a collection of programming tasks being resolved in as many programming languages as possible.You can post solutions to a particular task using a particular language (Delphi, Java, C++,… … Read more 13 years ago in Delphi, Delphi Programming, Object Pascal Programming, pascal, Pascal Programming, programming 0

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Parameterized Factory Method in Delphi

Yanniel Yanniel Factory Method is a creational design pattern, whose intent (according to Design Patterns: Elements of Reusable Object-Oriented Software) is to:“Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory… … Read more 13 years ago in Creational Patterns, Delphi, Delphi Programming, Design Patterns, Object-Oriented Programming, pascal, programming 0

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Template Method Design Pattern in Delphi. A working example

Yanniel Yanniel The Template Method Pattern is very easy to understand and implement. Here’s the definition borrowed from Design Patterns: Elements of Reusable Object-Oriented Software book:“Define the skeleton of an algorithm in an operation, deferring some steps… … Read more 13 years ago in Behavioral Patterns, Delphi, Delphi Programming, Design Patterns, Object-Oriented Programming, pascal, programming, Template Method 0

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New certifications available for Delphi Developers

Yanniel Yanniel Last June 12th, 2011, I received an Embarcadero Community Newsletter pointing out that “certification exams are now available for Delphi developers.  Embarcadero’s Delphi Certification Program offers two levels: Delphi Certified Developer and Delp… … Read more 13 years ago in Delphi, Delphi Programming, Object-Oriented Programming, pascal, programming 0