Programming paradigm
From Wikipedia, the free encyclopedia
A programming paradigm is a paradigmatic style of programming (compare with a methodology, which is a paradigmatic style of doing software engineering).
A programming paradigm provides (and determines) the view that the programmer has of the execution of the program. For instance, in object-oriented programming, programmers can think of a program as a collection of interacting objects, while in functional programming a program can be thought of as a sequence of stateless function evaluations.
Just as different groups in software engineering advocate different methodologies, different programming languages advocate different programming paradigms. Some languages are designed to support one particular paradigm (Smalltalk and Java support object-oriented programming while Haskell and Scheme support functional programming), while other programming languages support multiple paradigms (such as Common Lisp, Python, and Oz.)
Many programming paradigms are as well-known for what techniques they forbid as for what they enable. For instance, pure functional programming disallows the use of side-effects; structured programming disallows the use of goto. Partly for this reason, new paradigms are often regarded as doctrinaire or overly rigid by those accustomed to earlier styles. However, this avoidance of certain techniques can make it easier to prove theorems about a program's correctness—or simply to understand its behavior—without limiting the generality of the programming language.
The relationship between programming paradigms and programming languages can be complex since a programming language can support multiple paradigms. For example, C++ is designed to support elements of procedural programming, object-based programming, object-oriented programming, and generic programming. However, designers and programmers decide how to build a program using those paradigm elements. One can write a purely procedural program in C++, one can write a purely object-oriented program in C++, or one can write a program that contains elements of both paradigms.
[edit] Examples
- Data-directed programming
- Structured programming —compared to Unstructured programming
- Imperative programming, compared to Declarative programming
- Message passing programming, compared to Imperative programming
- Procedural programming, compared to Functional programming
- Value-level programming, compared to Function-level programming
- Flow-driven programming, compared to Event-driven programming
- Scalar programming, compared to Array programming
- Class-based programming, compared to Prototype-based programming (within the context of object-oriented programming)
- Constraint programming, compared to Logic programming
- Recursive programming, compared to Iterative programming
- Component-oriented programming (as in OLE)
- Aspect-oriented programming (as in AspectJ)
- Logic programming (as in Mathematica)
- Pipeline Programming (as in the UNIX command line)
- Subject-oriented programming
- Reflective programming
- Dataflow programming (as in Spreadsheets)
- Policy-based programming
- Tree programming
- Annotative programming—flarelang.sourceforge.net/
- Attribute-oriented programming (might be the same as annotative programming) (as in Java 5 Annotations, pre-processed by the XDoclet class; C# Attributes )
- Concept-oriented programming is based on using concepts as the main programming construct.
