feature: vor und nachteile

praesentation/node_modules/d3-shape/src/order/ascending.js

@@ -0,0 +1,12 @@
+import none from "./none.js";
+
+export default function(series) {
+  var sums = series.map(sum);
+  return none(series).sort(function(a, b) { return sums[a] - sums[b]; });
+}
+
+export function sum(series) {
+  var s = 0, i = -1, n = series.length, v;
+  while (++i < n) if (v = +series[i][1]) s += v;
+  return s;
+}