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

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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


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