Extracting values from lists about mathlink.jl HOT 8 CLOSED

As the W2Julia function solves the original issue is will close this ticket.

from mathlink.jl.

You can just access the .args field of the returned object, but that is probably not ideal. This is related to #22.

from mathlink.jl.

I guess there is no harm in making them iterable and defining getindex on them? then you could just call collect?

from mathlink.jl.

Would there be any efficiency issues (e.g unnecessary copying)?

from mathlink.jl.

Yes, but we already copy so much stuff it probably wouldn’t make much difference.

from mathlink.jl.

Ok, then that seems fine, intuitive (I did try calling collect initially to see if it would work), and certainly better than the current situation.

Would it be at-all useful to define specialized collect methods that would just return args when we detect that it is already an array?

from mathlink.jl.

we may want a different function, since collect doesn't alias even for arrays:

julia> X = rand(3);

julia> collect(X) === X
false

parent is often used for similar things, and might make sense?

from mathlink.jl.

Hi @jebej , based on ticket (#72) I have snuck in the feature (W2Julia ) in into the 0.5.3 release of yesterday (https://github.com/JuliaInterop/MathLink.jl/releases/tag/v0.5.3). It aims to convert MathLink objects to Julia style objects.

At the moment it can convert the "Assumptions" to a dictionary and lists to a list. Below are some examples:

@test W2Julia(W`{1,2,3}`) == [1,2,3]
@test W2Julia(W`{1,a,3}`) == [1,W"a",3]
@test W2Julia(W`{1,a,{1,2}}`) == [1,W"a",[1,2]]
@test W2Julia(W`Association["team" -> "HOU", "lastName" -> "Ching"]`) == Dict( "team" => "HOU" , "lastName" => "Ching")
@test W2Julia(W`Association["team" -> {1,2,3}, "lastName" -> "Ching"]`) == Dict( "team" => [1,2,3] , "lastName" => "Ching")
@test W2Julia(W`{1,Association["team" -> {1,2,3}, "lastName" -> "Ching"]}`) == [1,Dict( "team" => [1,2,3] , "lastName" => "Ching")]

As this is almost at the embryo stage, feel free to report strange (or lacking) behavior i other tickets.

from mathlink.jl.