Writing better / faster / more julia-ish code

General Usage
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3

I did not expect the macro approach to work like this, either; however, I tried this based on this thread. To demonstrate:

ff = Signal(0.0)
gg = @medWin(ff,3)

for i=1:10
    push!(ff, i)
    println("ff is ", ff.value)
    println("gg is ", gg.value)
    println("-----")
end

Gives desired output for gg (median of last 3 values of f):

ff is 1.0
gg is 0.5
-----
ff is 2.0
gg is 1.0
-----
ff is 3.0
gg is 2.0
-----
ff is 4.0
gg is 3.0
-----
ff is 5.0
gg is 4.0
-----
ff is 6.0
gg is 5.0
-----
ff is 7.0
gg is 6.0
-----
ff is 8.0
gg is 7.0
-----
ff is 9.0
gg is 8.0
-----
ff is 10.0
gg is 9.0
-----

And, i forgot to include my lastX function:

function lastX(u::Signal, n ::Int)
    sigs = Array{Signal}(1,n+1)
    sigs[1] = u
    for i=1:n
        sigs[i+1] = previous(sigs[i])
    end
    return zip(sigs[2:end]...)
end