JSON object sort by single field

gistfile1.js

var sort_by = function(field, reverse, primer){

   reverse = (reverse) ? -1 : 1;

   return function(a,b){

       a = a[field];
       b = b[field];

       if (typeof(primer) != 'undefined'){
           a = primer(a);
           b = primer(b);
       }

       if (a<b) return reverse * -1;
       if (a>b) return reverse * 1;
       return 0;

   }
}

// Example:
// var homes = [
//    {"h_id":"3",
//     "city":"Dallas",
//     "state":"TX",
//     "zip":"75201",
//     "price":"162500"},
//    {"h_id":"4",
//     "city":"Bevery Hills",
//     "state":"CA",
//     "zip":"90210",
//     "price":"319250"},
//    {"h_id":"5",
//     "city":"New York",
//     "state":"NY",
//     "zip":"00010",
//     "price":"962500"}
//    ];
//
// var sortedHomes=homes.sort(sort_by('state', true, function(a){return a.toUpperCase()}));
// console.log(sortedHomes);

// Attribution: http://stackoverflow.com/questions/979256/how-to-sort-a-json-array