d3_selectionPrototype.selectAll = function(selector) {

  var subgroups = [],

      subgroup,

      node;

  if (typeof selector !== "function") selector = d3_selection_selectorAll(selector);

  for (var j = -1, m = this.length; ++j < m;) {

    for (var group = this[j], i = -1, n = group.length; ++i < n;) {

      if (node = group[i]) {

        subgroups.push(subgroup = d3_array(selector.call(node, node.__data__, i)));

        subgroup.parentNode = node;

      }

    }

  }

  return d3_selection(subgroups);

};

function d3_selection_selectorAll(selector) {

  return function() {

    return d3_selectAll(selector, this);

  };

}