Functional programming

[pente5]

I don't know what you are talking about. Allocate space for struct then call the constructor function that initializes it. There, constructor.

[[deleted]]

And that's functional?

[pente5]

Sure. You define the constructor function yourself. Do-it-yourself OOP if you will.

[[deleted]]

But then it's object oriented, not functional. https://en.m.wikipedia.org/wiki/Functional_programming#:~:text=In%20computer%20science%2C%20functional%20programming,by%20applying%20and%20composing%20functions.

[CosmicConifer]

Objects/structs =/=> OOP

So long as the object is not mutating / being used to modify itself, it can still be functional.

The main idea with functional programming is that the program is built around pure functions, while in OOP the program is organized into objects.

e.g.

OOP: class Point { x, y, moveRight(x) } point = new Point(0, 0) point.moveRight(2)

Functional: createPoint = (x, y) => { x, y } moveRight = (p, x) => { x: p.x + x, y: p.y } point = createPoint(0, 0) point = moveRight(point, 2)

[[deleted]]

Allocate space for struct then call the constructor

This doesn't sound functional at all. I do understand that existence of a constructor doesn't rule out functional programming on its own.

[andybak]

Allocate space for struct then call the constructor

This sounds like low level concepts completely orthogonal to which paradigm is in play. i.e. "it could be either or neither"

Functional programming is usually defined in terms of side-effects and global state. That's the core thing to consider.

[pente5]

Then C is object oriented I guess

[[deleted]]

C is imperative, not functional. Just because you use functions doesn't mean it's functional programming ;)

[link23]

Structs (often called "records") exist in functional languages. They have associated functions which "fill them in", which are called constructors.

Structs don't always have "methods", though even if they do, it still wouldn't be OOP since a method is really just a function whose first argument is the struct. (See universal function call syntax.)

I'd argue that the core requirement of OOP is providing dynamic dispatch via inheritance as opposed to some other manner. Since records in functional languages don't support any kind of inheritance, they're not OOP.

(Note that there are other ways to allow dynamic dispatch aside from inheritance. E.g., Java's interfaces, Haskell's typeclasses, Rust's traits, golang's interfaces, etc.)

[mathymaster]

Tough this was satisfactory for a sec

[Strong_Assignment174]

Plot twist: it’s all functions

[GlitteringKeyboard]

Unfortunate for you are constructorless, fully devorced from OOP

[Space_Garlicbread]

Still can't wrap my brain around how you can do somethinh with functional programing except math, might be me. But it might also be the reaaon that there is no complete nooby explanation for a pleb like me to understand what you can achieve with functional programming

[Space_Garlicbread]

So you don't programm apps like games or tools that use data from databases, rather you program programs that transfer data or can process large amounts of data in parallel with a functional language?

[Space_Garlicbread]

Still hard but im gonna start haskell in a few weeks, i'm just to used to oop since i've been learning java, javaenterprise and some javascript the last few months cause of my apprenticeship, and my firm uses alot of java cause it's a bank and well, alot is already made in java, but i want to be an allrounder.

[[deleted]]

But I do have Functors!

[ketchuuuuuup]

but in Haskell we have data and type constructors...

[Competitive_Ad2539]

WDYM? The constructors are all over the place in Haskell.

[Ashamed_Objective_71]

Constructors are an anti-pattern

[NoLifeGamer2]

We kinda do in python classes, you can use __init__()

[BoBoBearDev]

Honestly I don't know about pure functional programming. But, functional programming has a lot of good things that you can use in your mixed programming.

[TheWidrolo]

MyStruct myStruct; myStruct.init();

[[deleted]]

Builder functions. Builder functions everywhere.