sort array javascript

gistfile1

// Sort by price high to low
//homes.sort(sort_by('price', true, parseInt));

var sort_by = function(field, reverse, primer){
   var key = function (x) {return primer ? primer(x[field]) : x[field]};
   return function (a,b) {
       var A = key(a), B = key(b);
       return ((A < B) ? -1 :
               (A > B) ? +1 : 0) * [-1,1][+!!reverse];                  
   }
}