függvénypure

Függvénypure is a term derived from functional programming concepts, specifically referring to a pure function. A pure function is a function that adheres to two strict rules. Firstly, given the same input, it will always produce the same output. It does not depend on any hidden state or external variables that could change its behavior. Secondly, a pure function has no side effects. This means it does not modify any state outside of its own scope, such as changing global variables, performing input/output operations, or writing to a database.

The concept of "függvénypure" emphasizes predictability and testability. Because pure functions are deterministic, their behavior can be easily understood and tested in isolation. This characteristic makes code written with pure functions more robust and less prone to bugs. In languages that support or encourage functional programming paradigms, such as Haskell or F#, functions are often designed to be pure by default. While languages like JavaScript or Python are not strictly functional, developers can still strive to write pure functions within them to gain some of these benefits. The principle of "függvénypure" promotes a more declarative style of programming, where the focus is on what the computation should achieve rather than how it should be achieved step-by-step. This can lead to more concise and maintainable codebases.