I have an array A that i want to subset, as in

A = rand(100,100)
A[A.>0.5]

I'm struggling to find the extension of this to more than one rule - i 
would have expected that to work:

A[A.>0.5&A.<0.9]
ERROR: no method &(Float64, Float64)
 in & at array.jl:743

how can I get a valid boolean index vector out of two? why does  A.>0.5 
return a float and not a bool?

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