[Refactor] exports-last: use array.prototype.findlastindex

Author: ljharb

CHANGELOG.md

@@ -17,6 +17,7 @@ This change log adheres to standards from [Keep a CHANGELOG](https://keepachange
 - [Docs] [`no-duplicates`]: fix example schema ([#2684], thanks [@simmo])
 - [Docs] [`group-exports`]: fix syntax highlighting ([#2699], thanks [@devinrhode2])
 - [Docs] [`extensions`]: reference node ESM behavior ([#2748], thanks [@xM8WVqaG])
+- [Refactor] [`exports-last`]: use `array.prototype.findlastindex` (thanks [@ljharb])
 
 ## [2.27.5] - 2023-01-16
 

package.json

@@ -102,6 +102,7 @@
   },
   "dependencies": {
     "array-includes": "^3.1.6",
+    "array.prototype.findlastindex": "^1.2.2",
     "array.prototype.flat": "^1.3.1",
     "array.prototype.flatmap": "^1.3.1",
     "debug": "^3.2.7",

src/rules/exports-last.js

@@ -1,3 +1,5 @@
+import findLastIndex from 'array.prototype.findlastindex';
+
 import docsUrl from '../docsUrl';
 
 function isNonExportStatement({ type }) {
@@ -20,15 +22,10 @@ module.exports = {
   create(context) {
     return {
       Program({ body }) {
-        const lastNonExportStatementIndex = body.reduce(function findLastIndex(acc, item, index) {
-          if (isNonExportStatement(item)) {
-            return index;
-          }
-          return acc;
-        }, -1);
+        const lastNonExportStatementIndex = findLastIndex(body, isNonExportStatement);
 
         if (lastNonExportStatementIndex !== -1) {
-          body.slice(0, lastNonExportStatementIndex).forEach(function checkNonExport(node) {
+          body.slice(0, lastNonExportStatementIndex).forEach((node) => {
             if (!isNonExportStatement(node)) {
               context.report({
                 node,