Dictionary of arrays in Julia and breed fractions

 So in Julia I want to create a dictionary (hash table or associative array) of arrays to store breed composition in dairy cattle. It took me a while but I found out how to declare it:

julia> a=Dict{String,Array{Float64,1}}()

Imagine the following pedigree

A 0 0 Holstein
B 0 0 Jersey
C A B
D A C

then this Julia script computes breed fractions

#=

A 0 0 Holstein

B 0 0 Jersey

C A B

D A C

=#

breedcomp=Dict{String,Array{Float64,1}}()

#purebred founders

breedcomp["A"]=[1.0,0.0]

breedcomp["B"]=[0.0,1.0]

#rest of pedigree

breedcomp["C"]=0.5*(breedcomp["A"]+breedcomp["B"])

breedcomp["D"]=0.5*(breedcomp["A"]+breedcomp["C"])

display(breedcomp)

Dict{String, Vector{Float64}} with 4 entries:

  "B" => [0.0, 1.0]

  "A" => [1.0, 0.0]

  "C" => [0.5, 0.5]

  "D" => [0.75, 0.25]