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1. Top results related to generic programming

   • Generic programming vs. Metaprogramming

     Top Answer

     Answered Oct 14, 2010 · 49 votes

     • Programming: Writing a program that creates, transforms, filters, aggregates and otherwise manipulates data.
     • Metaprogramming: Writing a program that creates, transforms, filters, aggregates and otherwise manipulates programs.
     • Generic Programming: Writing a program that creates, transforms, filters, aggregates and otherwise manipulates data, but makes only the minimum assumptions about the structure of the data, thus maximizing reuse across a wide range of datatypes.

     As was already mentioned in several other answers, the distinction can be confusing in C++, since both Generic Programming and (static/compile time) Metaprogramming are done with Templates. To confuse you even further, Generic Programming in C++ actually uses Metaprogramming to be efficient, i.e. Template Specialization generates specialized (fast) programs from generic ones.

     Also note that, as every Lisp programmer knows, code and data are the same thing, so there really is no such thing as "metaprogramming", it's all just programming. Again, this is a bit hard to see in C++, since you actually use two completely different programming languages for programming (C++, an imperative, procedural, object-oriented language in the C family) and metaprogramming (Templates, a purely functional "accidental" language somewhere in between pure lambda calculus and Haskell, with butt-ugly syntax, since it was never actually intended to be a programming language.)

     Many other languages use the same language for both programming and metaprogramming (e.g. Lisp, Template Haskell, Converge, Smalltalk, Newspeak, Ruby, Ioke, Seph).

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   • generic programming in java

     Top Answer

     Answered Nov 29, 2009 · 11 votes

     If the above were true, then you could take your collection of managers, treat it as a collection of employees, and then put any employee into a collection of managers (i.e. not just a manager, but a (say) graduate trainee, a CIO etc.)

     It's a little counter-intuitive. An orange is a fruit. A list of oranges is not a list of fruit (otherwise you could put an apple in it). There's a concise explanation in the Java Generics Tutorial.

     Other Answers

     Answered Nov 29, 2009 · 3 votes

     This is called covariance and contravariance. The issue you just discovered is a traditional problem of type systems. The corresponding wikipedia page discusses this issue in Java. It's worth taking some time to understand these issues correctly has it also relates also to method overriding (since JDK5, you can indeed change the return type of an overriden method as long as it's covariant).

     Other Answers

     Answered Nov 29, 2009 · 2 votes

     Just imagine your code would be legal. (Let Apple be a subclass of Fruit)

     Collection<Fruit> apples = { new Apple() };Collection<Apple> fruit = apples;-fruit.add(new Banana()); // Inserting a banana into a list of apples // Breaks type safety-

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   • generic programming in C with void pointer

     Top Answer

     Answered Mar 16, 2010 · 11 votes

     The solution is not to use void* unless you really, really have to. The places where a void pointer is actually required are very small: parameters to thread functions, and a handful of others places where you need to pass implementation-specific data through a generic function. In every case, the code that accepts the void* parameter should only accept one data type passed via the void pointer, and the type should be documented in comments and slavishly obeyed by all callers.

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   • generic programming in java with dynamic nature and fully customizable

     Top Answer

     Answered Sep 02, 2014 · 3 votes

     This is a surprisingly common, and an extremely bad idea. Sounds like you're heading towards the Inner Platform anti pattern.

     It seems good when you hear it for the first time (or if you're a manager), but the result is a system that tries to do everything, but ends up doing nothing well.

     The database becomes very inefficient and corruption prone as well. I've had the unfortunate privilege to see this in action.

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     4/5

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     generic programming in c++	generic programming wikipedia
     generic programming java	generic programming concepts
     generic programming with templates	generic programming theory
     generic programming language	generic programming in java pdf

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2. en.wikipedia.org › wiki › Generic_programmingGeneric programming - Wikipedia

   en.wikipedia.org › wiki › Generic_programming

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   Generic programming is a style of computer programming in which algorithms are written in terms of data types to-be-specified-later that are then instantiated when needed for specific types provided as parameters.

3. www.geeksforgeeks.org › generics-in-cGenerics in C++ - GeeksforGeeks

   www.geeksforgeeks.org › generics-in-c

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   Apr 1, 2019 · Learn how to use generics in C++ to write efficient and reusable code for different data types. See examples of generic functions, classes and arrays using templates.

4. www.generic-programming.org › about › introAn Introduction to Generic Programming

   www.generic-programming.org › about › intro

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   May 27, 2011 · Learn the basics of Generic Programming, a programming paradigm for developing efficient, reusable software libraries. Find out how to use lifting and specialization processes to create generic algorithms that can be specialized for different uses and platforms.

5. oswalt.dev › 2020 › 08What Is Generic Programming? | Matt Oswalt

   oswalt.dev › 2020 › 08

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   Aug 4, 2020 · Learn what generic programming is, how it works in Python and Go, and how it can be useful for expressing and managing runtime tradeoffs. Compare the advantages and disadvantages of generic programming with dynamic typing and static typing, and see how it relates to Rust.

6. docs.oracle.com › javase › tutorialLesson: Generics (Updated) (The Java™ Tutorials > Learning ...

   docs.oracle.com › javase › tutorial

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   This beginner Java tutorial describes fundamentals of programming in the Java programming language.

7. People also ask

   What are examples of generic programming?

   • For example, classes like an array, map, etc, which can be used using generics very efficiently. We can use them for any type. The method of Generic Programming is implemented to increase the efficiency of the code.

   Generics in C++ - GeeksforGeeks

   www.geeksforgeeks.org/generics-in-c/

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   How to implement generics in C++?

   • Generics can be implemented in C++ using Templates. Template is a simple and yet very powerful tool in C++. The simple idea is to pass data type as a parameter so that we don’t need to write the same code for different data types. For example, a software company may need sort () for different data types.

   Generics in C++ - GeeksforGeeks

   www.geeksforgeeks.org/generics-in-c/

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   What is a generic type?

   • By using generics, programmers can implement generic algorithms that work on collections of different types, can be customized, and are type safe and easier to read. A generic type is a generic class or interface that is parameterized over types. The following Box class will be modified to demonstrate the concept.

   Introducing Generics - Dev.java

   dev.java/learn/generics/intro/

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   What is a generic in Java?

   • Generics is the idea to allow type (Integer, String, … etc and user-defined types) to be a parameter to methods, classes and interfaces. For example, classes like an array, map, etc, which can be used using generics very efficiently. We can use them for any type.

   Generics in C++ - GeeksforGeeks

   www.geeksforgeeks.org/generics-in-c/

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8. dev.java › learn › genericsIntroducing Generics - Dev.java

   dev.java › learn › generics

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   Enabling programmers to implement generic algorithms. By using generics, programmers can implement generic algorithms that work on collections of different types, can be customized, and are type safe and easier to read. Generic Types. A Simple Box Class. A generic type is a generic class or interface that is parameterized over types.

9. www.generic-programming.org › about › introAn Introduction to Generic Programming

   www.generic-programming.org › about › intro

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   May 27, 2011 · We can now lift these two algorithms to create a single, generic algorithm that can provide the functionality of both versions of sum. To do so, we replace int and float with a type parameter T, using C++ templates: template T sum( T * array, int n) {. T result = 0; for (int i = 0; i < n; ++i) result = result + array[i];