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import {Selection} from "./index.js";
import array from "../array.js";
import selectorAll from "../selectorAll.js";
function arrayAll(select) {
return function() {
return array(select.apply(this, arguments));
};
}
export default function(select) {
if (typeof select === "function") select = arrayAll(select);
else select = selectorAll(select);
for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
if (node = group[i]) {
subgroups.push(select.call(node, node.__data__, i, group));
parents.push(node);
}
}
}
return new Selection(subgroups, parents);
}