Hello, I´m new in Julia language. I´m thinking to write a framework that allows me to work with evolutionary algorithms. I come from Java language and the first idea that I had was to create a type hierarchy. I´m using Julia 0.6. Just for illustrating what is my problem. I have the following type t…

You cannot inherit from concrete types. [image] ogreyesp: this is not actually a good OOP practice Julia is not really a OO language. Perhaps you can use composition, or alternatively look at some macro that do the “field inheritance” for you like GitHub - tbreloff/ConcreteAbstractions.jl: C…

No, this was a specific design decision in Julia not to implement that kind of inheritance. From https://docs.julialang.org/en/stable/manual/types/ : One particularly distinctive feature of Julia’s type system is that concrete types may not subtype each other: all concrete types are final and may …

[image] ogreyesp: therefore I must to put the chromosome field into each composite type that inherits of Individual, and this is not actually a good OOP practice. [citation needed]

Hi @ogreyesp , I hope the reply by @rdeits and the link to @ChrisRackauckas ’s blog post were helpful. When I came to Julia, this was one of the first things I bumped into, but (just like everyone else) I quickly found that changing around the way I thought about the problem (dropping OOP) and instea…

Hello, Certainly, it was not my intention to begin a debate about what is better, composition or inheritance, therefore I encountered pointless to put a citation about this. Yes, I come from Java language (almost 15 years in this language), that is a different paradigm, and I still learning the way…

Yeah, wow, I really wasn’t expecting this to go so far off the rails. Sorry this had to be one of your early julia-community experiences. Anyway, I am happy to talk about the ways I’ve made Julia work for the actual problems I want to solve (and I’m sure others here are too), and, in particular, th…

[image] ogreyesp: the first idea that I had was to create a type hierarchy This is in fact what makes me most happy about Julia - I worked in C++ for some years earlier in my life, and the answer to every problem always started with developing a type hierarchy. I always found that surprisingl…

@ogreyesp I actually find the composition as a solution to a similar problem is that you describe quite attractive in my case. I write methods for the abstract type with the assumption that the concrete types will have a certain field to hold the data. The composition can be done quite nicely …

@ogreyesp quite separate from your original question and echoing @mkborregaard , you should chat with @Ward9250 about this - he’s done a ton of work in Bio.jl precisely on the topic of genetic variation in an evolutionary framework. Your work might overlap, or fit nicely into the gaps of what he’s do…

A few thoughts that might help you. Multi-inheritance in Julia can be achieved sort of… abstract type Indicators end struct TypeA <: Indicators end struct TypeB <: Indicators end abstract type Basic end mutable struct myobj <: Basic First::Float64 Second::Indicator function myobj() …

Inheritance in Julia

New to Julia

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Inheritance in Julia

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