当我在c＃中定义一个类中的所有函数时，我在进行函数式编程吗？

Question

I am asking this question because I don't want to humiliate myself in a job interview in near future.

I like to create many functions in one place when programming and avoid creating classes and dealing with entity states as much as possible. Can I say that I like functional programming and this is my style or preference in programming or do I have to use a functional programming language like F# or Haskell to be able to say that?

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According to http://en.wikipedia.org/wiki/Comparison_of_programming_paradigms I am actually doing imperative programming in an object oriented language.

Answer 1

No.

The hallmarks of functional programming are

• avoiding objects (or anything else) with state changes
• avoiding mutable data and mutable data structures (more simply; variables don't change their values)
• all (or very nearly all) functions are pure .

Many functional languages also rely on pattern matching and strong typing, though it is possible to program in a functional style in a language which lacks these features.

To learn more about functional programming, consider reading an introduction to the field (for example Learn You a Haskell for Great Good ).

Answer 2

No. Putting all methods in one class makes you a fan of procedural programming, in other words, you are anti-OOP.

You could claim to be doing functional programming in C#, if most/all of your variables/arguments/functions were const or readonly , of if these qualifiers could be applied.

Answer 3

我认为你描述的是更多的程序编程，而不是功能编程。

Answer 4

Afaik you can do functional programming in an oop language. If I understand correctly, functional simply means that you pass in all the stuff the function needs and you take out again the results, storing nothing for next call etc. In other words, your classes and methods are stateless.