[julia-users] Dictionary lookup using only the hash value

[Ritchie Lee]

As I understand it, Julia dicts use Base.hash when storing custom types as 
keys.  Is there a way to look up based on the hash alone?

e.g.,

type MyType
a::Int
end

Base.hash(x::MyType) = hash(x.a, hash(MyType))

x = MyType(1)
D = Dict{MyType, Bool}()
D[x] = true

Now, is there a way to lookup using h only? 

h = hash(x)
D[h]

Is this be safe to do?

Thanks!