Index: node_modules/d3-array/src/scan.js
===================================================================
--- node_modules/d3-array/src/scan.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-array/src/scan.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,6 @@
+import leastIndex from "./leastIndex.js";
+
+export default function scan(values, compare) {
+  const index = leastIndex(values, compare);
+  return index < 0 ? undefined : index;
+}