def f(key,value)
 
"function(v) {
   data = v.values[0].data;
   dt = eval('(' + data + ')')
   value = dt['#{key}']
   if (value == '#{value}') {
      return [data];
   }
   return [];
}"
      mr.map(mapfunc, :keep => true)
      json_array = mr.run
      objects_array = json_array.map {|s| JSON.parse s}
 
end