Enumerate with keys from a dict

[simeonschaub]

The problem here is that Dict is not thread safe and you are therefore creating race conditions. You might be interested in this thread:

Can dicts be threadsafe?

dict = Dict{Int64,Vector{Float64}}() nentries = 5e5 Threads.@threads for n in 1:nentries dict[n] = [rand() for i in 1:100] end @assert length(dict) == nentries The assertion fails for me in Julia 1.1.0, as the dict is shorter than the number of entries. Is there a way to safely use dicts with threads?