How to find the minimum value from the ranges in array of hashes in ruby? -

i have below array of hashes

z = {"range"=>[{"10-50"=>"5"}, {"50-100"=>"15"}, {"100-150"=>"25"}]}  

how can output 10

you can try following:

z["range"].map(&:keys).flatten.map(&:to_i).min #=> 10 

demo