init keyword for logsumexp and co

[theogf]

It would be great to have a init keyword similar to sum for empty collections.

I would basically expect

logsumexp(Float64[]) == -Inf

It just makes it slightly complicated to make it type stable so I am not sure how to go about this.

[theogf]

Ok my bad, this example already works....
I probably have a type issue somewhere.

[theogf]

For context, this is my issue:

d = Dict(rand(3) .=> rand(3))
[x for (k, x) in pairs(d) if k > 1] # This is type stable
logsumexp(x for (k,x) in pairs(d) if k > 1) # This errors