SharedArray + pmap question

[Max Shron]

Hi all,

I looked around but have been unable to find an answer to this question. Here is a very minimal example of how I'd like to use a SharedArray:

S = SharedArray(Int, (3))

pmap((i -> S[i]), 1:3)

When I run this with julia -p 3 (with 0.3.6), I get the following error:

ERROR: S not defined

or with Master (0.4.0-dev+3631)

ERROR: UndefVarError: S not defined

If I call procs(S) I get back [1,2,3] as expected. What else do I need to do to make S visible to the other processes? Presumably if I use @everywhere S = SharedArray(Int, (3)) that defeats the purpose of SharedArray, right?

I'm running OS X 10.9.5.

Thanks,

Max 

[René Donner]

If I run your code in the REPL I see the same behavior. Putting it into a function works:

julia> function test()
S = SharedArray(Int, (3,))
pmap(i->S[i], 1:3)
end
test (generic function with 1 method)

julia> test()
3-element Array{Any,1}:
0
0
0


The same holds true when you use an ordinary Array instead of a SharedArray.

Can someone explain the reason why anonymous functions referencing variables in the global scope are handled differently?