I started exploring Julia very recently and I like it. I’ve been chatting about it with colleagues. Many people coming from OOP languages (Python…) like the syntax object.method(a,b,c…). Since you can get a preview of the available methods acting on object with tab press. Would it be possible to …

[image] gianmariomanca: Very interesting pattern when there is only one method. The power of multiple dispatch allows for any number of methods to be added this way: julia> mutable struct IIRFilter state::Float64 alpha::Float64 end …

@Raf can you write an explicit example of the ambiguity? Wouldn’t you get f.p for the property and f.p() for the method? or something along those lines? Is it something related to the property itself being a function, or the issue is even more basic in Julia? This didn’t seem to worry Bjarne Stro…

[image] gianmariomanca: @Raf can you write an explicit example of the ambiguity? (Taking the example from above:) mutable struct IIRFilter state::Float64 alpha::Float64 end julia> f = IIRFilter(0.5, 0.7) IIRFilter(0.5, 0.7) # This could of course be a much more complicat…

[image] Sukera: The problem of course is that you lose some sense of what each combination of arguments actually does. Moreover, you can’t distinguish between two methods with the same number of arguments and the same types of arguments but different behaviour this way. This is what I was ref…

In Julia any object can be called like that. julia> struct Callable end julia> (::Callable)(x) = 2x julia> obj = (a=Callable(), b=Callable()) (a = Callable(), b = Callable()) julia> obj.b(5) 10 So there is so syntactical distinction between fields and functions… anything can be called as a func…

[image] Mason: This has really been discussed to death in a lot of different places, usually asked for by newcomers, One recent thread Is it reasonable to mimic a Python class with mutable structs?

[image] pdeffebach: The auto-completion is the hard part, and it seems like there are some serious efforts underway to make it easier. This is the first I’ve heard of such efforts, do you have more information to share about them? Good completion is probably the holy grail of editor tooling …

[image] gianmariomanca: (where IIRfilter is the first argument of the method if we are thinking about standard OOP, or maybe a more general solution that is closer in spirit with multiple dispatch?) Probably this is implicit (or explicit) in the answers above, and I’ve missed it, but consider…

[image] gianmariomanca: @Mason , thank you for welcoming me. I think it was a mistake on my part to bring up “barrier of entry”, it seems to monopolize the attention and bring the discussion in the unproductive direction of “this language vs that language”. I did it just because that episode wit…

Just because I’m bored. Don’t do this :slight_smile: macro bless(T, fs...) fswitch = map(fs) do f :(s === nameof($f) && return (args...;kwargs...) -> $f(t, args...; kwargs...)) end quote @eval Main begin function Base.getproperty(t::$T, s::Symbol) …

Allowing the object.method(args...) syntax as an alias for method(object, args ...)

Internals & Design

Eben60 May 30, 2021, 4:42pm 26

One recent thread Is it reasonable to mimic a Python class with mutable structs?

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Allowing the object.method(args...) syntax as an alias for method(object, args ...)

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