import “../arrays/ascending”; import “selection”;

d3_selectionPrototype.sort = function(comparator) {

comparator = d3_selection_sortComparator.apply(this, arguments);
for (var j = -1, m = this.length; ++j < m;) this[j].sort(comparator);
return this.order();

};

function d3_selection_sortComparator(comparator) {

if (!arguments.length) comparator = d3.ascending;
return function(a, b) {
  return (!a - !b) || comparator(a.__data__, b.__data__);
};

}