Sort an array by multiple fields

gistfile1.js

  // Sort an array 
  array.sort(function(A, B) { 
    var a, b; 
    return (((a = A.field1) > (b = B.field1)) - (b > a)) || // Sort by field1
           (((a = A.field2) > (b = B.field2)) - (b > a))    // Sort by field2
  });