[julia-users] Composite typea as key for Dict

[Heorhi Valakhanovich]

type Composite
    a::Int
    b::Int
end

function isequal(a::Composite, B::Composite)
    return a.a==b.a && a.b==b.b
end

function hash(a::Composite)
    return a.a+a.b
end

a = Composite(1,1)
b = Composite(1,1)

println(isequal(a,b))
println(hash(a)==hash(b))

d = { a => 1}

println(haskey(d,b))


The output is
true
true
false

Am I missing something here? Is it possible to use composite types for a 
key?