Hi guys! I have one problem: if I have an array of symbols, how can I get their values inside a function scope? Something like this: function f(a::Array{Symbols,1}) a = 1 b = 2 c = 3 # Get the values of the symbols in `a` and return. end f([:a,:b]) Then it should return [1;2]. I…

[image] mike: Maybe I’ve missed something in your post but as far as I can tell s[:continuous_field1] will result in dynamic dispatch on the inner getindex call and probably bad performance, perhaps even worst that just using a Dict? Using Val like that is not recommended: see these two sections…

Actually, I just tested it. It doesn’t inline the constant correctly: type Test x::Vector{Float64} end import Base: getindex getindex(s::Test,sym::Symbol) = getindex(s,Val{sym}) getindex(s::Test,::Type{Val{:test_sym}}) = reshape(view(s.x,1:9),3,3) function test_dispatch(s) s[:test_sym] end f…

[image] ChrisRackauckas: But if you only ever use it in a function with constants With the following simplified (perhaps too simplified?) code I’m not seeing that behaviour: julia> immutable T x::Int end julia> Base.getindex(t::T, s::Symbol) = getindex(t, Val{s}) julia> B…

[image] ChrisRackauckas: That sucks… a macro would be a quick fix for this Yeah, macro is usually what I’d do with something like this. [image] ChrisRackauckas: (I wonder what was different last time I tried?) Tried with 0.3 - 0.6dev and they all do pretty much the same thing with tha…

Just using straight type dispatch or Enum types would work here too, and have slightly nicer syntax: s[Continuous_Field1] But that could quickly fill the namespace. But for this use case it would probably be a nice way to handle it (of course, don’t export all of these types). But the best way is…

[image] mike: No idea, one of our compiler gurus would need to answer that one :smile: I moved this discussion out to a thread in the development category. [image] Value type dispatch on constants Internals & Design This is best explained by an example. type Test …

Hi guys! Thanks very much for this help. Chris, I decided go with the approach of S[Val{:lat}] because I came up with a very simple way to define all those getindex and setindex!. Hence, it will be very easy to populate everything with the 200+ variables. The code I used is: importall Base.Opera…

Hi Chris, After implementing tons of operations using SimWorkspace. I could not solve the following error: ERROR: LoadError: TypeError: ODEIntegrator: in uType, expected uType<:Union{AbstractArray{T,N},Number}, got Type{SimWorkspace} in #solve#120(::Float64, ::Bool, ::Int64, ::DiffEqBase.Explicit…

I could fix it! I needed to make SimWorkspace a subtype of AbstractArray. Additionally, I had to create a recursivecopy! for this new type. Thank you very much for the help

Hi @ChrisRackauckas , I need your help one more time. I am almost finishing the first version using your approach. However, I have a very big problem. All my discrete variables are updated in the callback function. However, their values will influence the integration in the next steps. But, as you p…

Get values of symbols inside a function

General Usage

ChrisRackauckas December 11, 2016, 9:38am 25

I moved this discussion out to a thread in the development category.

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Get values of symbols inside a function

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