I have a JSON object that goes like this:

{data:

 [

  {name:Alan,height:171,weight:66},

  {name:Ben,height:182,weight:90},

  {name:Chris,height:163,weight:71}

 ]

 ,school:Dover Secondary

}

I would like to filter the JSON object to obtain data of those taller than 170 and heavier than 70 and subsequently sort this object. From the jQuery website, I understand that filtering would be easily achieved on a linear array with something like:

arr = jQuery.grep(arr, function(element, index){

  return (element > 70 && index = 'weight');

});

How do I filter both weight and height concurrently to get this:

{data:

 [

  {name:Ben,height:182,weight:90},

 ]

 ,school:Dover Secondary

}