What is the best way to merge a dictionary in Julia?
> dict1 = Dict("a" => 1, "b" => 2, "c" => 3)
> dict2 = Dict("d" => 4, "e" => 5, "f" => 6)
# merge both dicts
> dict3 = dict1 with dict2
> dict3
Dict{ASCIIString,Int64} with 6 entries:
"f" => 6
"c" => 3
"e" => 5
"b" => 2
"a" => 1
"d" => 4
You can use merge. If the Dicts have elements with the same key, the value for that key will be of the last Dict listed. If you want to combine the elements of the Dicts that have the same key, you can use merge(combine, collection, others...). combine is a function that receive two values and return a value.
Example of the docs:
julia> a = Dict("foo" => 0.0, "bar" => 42.0)
Dict{String,Float64} with 2 entries:
"bar" => 42.0
"foo" => 0.0
julia> b = Dict("baz" => 17, "bar" => 4711)
Dict{String,Int64} with 2 entries:
"bar" => 4711
"baz" => 17
julia> merge(+, a, b)
Dict{String,Float64} with 3 entries:
"bar" => 4753.0
"baz" => 17.0
"foo" => 0.0