AstonJ
Want OOP in Elixir?
https://github.com/wojtekmach/oop
Are you tired of all of that modules, processes and functions nonsense? Do you want to just use classes, objects and methods? If so, use OOP [1] library in Elixir [2]!
[1] Actually, according to Alan Key, the inventor of OOP, “objects” is the lesser idea; the big idea is “messaging”. In that sense, I can’t agree more with Joe Armstrong’s quote that Erlang is “possibly the only object-oriented language”.
[2] Please don’t. You’ve been warned.
import OOP
class Person do
var :name
def say_hello_to(who) do
what = "Hello #{who.name}"
IO.puts("#{this.name}: #{what}")
end
end
joe = Person.new(name: "Joe")
mike = Person.new(name: "Mike")
robert = Person.new(name: "Robert")
joe.say_hello_to(mike) # Joe: Hello Mike
mike.say_hello_to(joe) # Mike: Hello Joe
mike.say_hello_to(robert) # Mike: Hello Robert
robert.say_hello_to(mike) # Robert: Hello Mike
joe.set_name("Hipster Joe")
joe.name # => Hipster Joe
First Post!
hubertlepicki
I love it.Most Liked
Qqwy
This is absolutely amazing. The next step is a Ruby cross-compiler!
All joking aside, my mind is blown by how much you can do with Elixir’s metaprogramming features. Thank you for sharing!
Qqwy
I’ve been thinking about this a lot lately. I had a discussion about this (e.g. the never-dying OOP vs FP – which is better argument.) yesterday with a colleague. My current state of mind:
- OOP and (Actor-Model-based) Functional Programming allow for a similar amount of abstraction and conciseness in programs.
- The features in (Actor-Model-based) Functional Programming (immutability, pattern-matching, real concurrency without deadlock-dangers) allow you to write programs that are much faster than the alternative in OOP-programs.
- There are a lot less ways in (AM-based) FP to shoot yourself in the foot than in OOP, because patterns like Demeters Law or tell, don’t ask resolve themselves naturally when working with processes/immutability.
I don’t remember who, but someone showed me this image a while back:
Basically, there are less patterns to learn, because most problems we face in Object-Oriented design resolve themselves in the functional world.
The hardest thing is to change your mindset from a I have this data and I want to put them in a hierarchy of objects to I have this data and I want to write functions/processes that consume it.
Of course there are nice features like Polymorphism, that some claim only exist in OOP-land, but I’d argue that that isn’t true; In Elixir we have Behaviours and Protocols to fill this gap, and they work great at allowing code-re-usage and ‘swapping out components’.
AstonJ
Last Post!
gregvaughn
I learned from José’s keynote at the first ElixirConf that Elixir was originally a prototypal OO language on the BEAM – closer to Ruby and Javascript. But, yes, it performed poorly and he went a new direction, bringing us the Elixir we know and love today.
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