From b453f2df78ae6769ad3e217decc332e2e89f6c89 Mon Sep 17 00:00:00 2001
From: Matthew Fedderly <24275386+mfedderly@users.noreply.github.com>
Date: Thu, 18 Dec 2025 15:38:18 -0500
Subject: [PATCH] Example PR to migrate from featureEach to iterFeatures

---
 packages/turf-helpers/index.ts       | 17 +++++++++++++++++
 packages/turf-moran-index/index.ts   |  6 +++---
 packages/turf-nearest-point/index.ts |  8 ++++----
 3 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/packages/turf-helpers/index.ts b/packages/turf-helpers/index.ts
index d6cd0d7dc5..849dd457c3 100644
--- a/packages/turf-helpers/index.ts
+++ b/packages/turf-helpers/index.ts
@@ -18,6 +18,23 @@ import {
 import { Id } from "./lib/geojson.js";
 export * from "./lib/geojson.js";
 
+// I'd normally put this in @turf/meta but it isn't full-TypeScript yet
+export function* iterFeatures<
+  G extends GeometryObject,
+  P extends GeoJsonProperties,
+>(
+  geojson: Feature<G, P> | FeatureCollection<G, P>
+): Generator<{ feature: Feature<G, P>; featureIndex: number }, void, unknown> {
+  if (geojson.type === "Feature") {
+    yield { feature: geojson, featureIndex: 0 };
+  } else {
+    const features = geojson.features;
+    for (let i = 0; i < features.length; i++) {
+      yield { feature: features[i], featureIndex: i };
+    }
+  }
+}
+
 /**
  * @module helpers
  */
diff --git a/packages/turf-moran-index/index.ts b/packages/turf-moran-index/index.ts
index 83a5e9e5bd..4ea2144484 100644
--- a/packages/turf-moran-index/index.ts
+++ b/packages/turf-moran-index/index.ts
@@ -1,6 +1,6 @@
 import { FeatureCollection } from "geojson";
 import { distanceWeight as spatialWeight } from "@turf/distance-weight";
-import { featureEach } from "@turf/meta";
+import { iterFeatures } from "@turf/helpers";
 
 /**
  * @typedef {object} MoranIndex
@@ -86,11 +86,11 @@ function moranIndex(
   });
 
   const y: number[] = [];
-  featureEach(fc, (feature) => {
+  for (const { feature } of iterFeatures(fc)) {
     const feaProperties = feature.properties || {};
     // validate inputField exists
     y.push(feaProperties[inputField]);
-  });
+  }
 
   const yMean = mean(y);
   const yVar = variance(y);
diff --git a/packages/turf-nearest-point/index.ts b/packages/turf-nearest-point/index.ts
index 2d6882a061..8cf7cae3a5 100644
--- a/packages/turf-nearest-point/index.ts
+++ b/packages/turf-nearest-point/index.ts
@@ -1,8 +1,7 @@
 import { Feature, FeatureCollection, GeoJsonProperties, Point } from "geojson";
-import { Coord, Units } from "@turf/helpers";
+import { Coord, iterFeatures, Units } from "@turf/helpers";
 import { clone } from "@turf/clone";
 import { distance } from "@turf/distance";
-import { featureEach } from "@turf/meta";
 
 interface NearestPoint<P extends GeoJsonProperties = GeoJsonProperties>
   extends Feature<Point> {
@@ -51,13 +50,14 @@ function nearestPoint<P extends GeoJsonProperties = GeoJsonProperties>(
 
   let minDist = Infinity;
   let bestFeatureIndex = 0;
-  featureEach(points, (pt, featureIndex) => {
+  for (const { feature: pt, featureIndex } of iterFeatures(points)) {
     const distanceToPoint = distance(targetPoint, pt, options);
     if (distanceToPoint < minDist) {
       bestFeatureIndex = featureIndex;
       minDist = distanceToPoint;
     }
-  });
+  }
+
   const nearestPoint = clone(points.features[bestFeatureIndex]);
 
   return {