Rails array exclude -

i have array feature date + time , temperature.

i looking count number of temperature below 25 degrees fall between specific time frame (16:00:00 - 20:00:00), unsure on how best tackle scenario.

data json file

{"status": "ok", "data": [{"2014-06-16 16:00:00": 24.2},{"2014-06-17 12:00:00": 30.2},{"2014-06-18 17:00:00": 42.9}]} etc 

controller

@data = json.parse(open(@temperature.url).read)  dates = [] temps = []  @data['data'].each |data|  dates << data.keys  temps << data.values end  @nights25 = dates.flatten.count {|i| ["16:", "17:", "18:", "19:", "20:"].include?(i) if i.temps > 25 end }  

maybe this:

temp = @data['data'].reduce({}, :merge)     temp.count { |time, deg| (16..20).include?(time.parse(time).hour) && deg < 25 }