Remove more Array#reduce() (#10907)

scripts/build/rollup-plugins/externals.mjs

@@ -1,17 +1,18 @@
 import path from "node:path";
 
 export default function (modules = []) {
-  const requires = modules.reduce((obj, mod) => {
-    obj[mod] = path.basename(mod).replace(/\.js$/, "");
-    return obj;
-  }, {});
+  const requires = new Map(
+    modules.map((mod) => [mod, path.basename(mod).replace(/\.js$/, "")])
+  );
 
   return {
     name: "externals",
 
     load(importee) {
-      if (requires[importee]) {
-        return `module.exports = eval("require")("./${requires[importee]}");`;
+      if (requires.has(importee)) {
+        return `module.exports = eval("require")("./${requires.get(
+          importee
+        )}");`;
       }
     },
   };

scripts/draft-blog-post.mjs

@@ -46,10 +46,9 @@ const categories = [
   { dir: "cli", title: "CLI" },
 ];
 
-const categoriesByDir = categories.reduce((result, category) => {
-  result[category.dir] = category;
-  return result;
-}, {});
+const categoriesByDir = new Map(
+  categories.map((category) => [category.dir, category])
+);
 
 const dirs = fs
   .readdirSync(changelogUnreleasedDir, { withFileTypes: true })
@@ -57,7 +56,7 @@ const dirs = fs
 
 for (const dir of dirs) {
   const dirPath = path.join(changelogUnreleasedDir, dir.name);
-  const category = categoriesByDir[dir.name];
+  const category = categoriesByDir.get(dir.name);
 
   if (!category) {
     throw new Error("Unknown category: " + dir.name);

tests/integration/__tests__/support-info.js

@@ -13,13 +13,14 @@ describe("CLI --support-info", () => {
 
 function getCoreInfo() {
   const supportInfo = prettier.getSupportInfo();
-  const languages = supportInfo.languages.reduce(
-    (obj, language) => ({ [language.name]: language.parsers, ...obj }),
-    {}
+  const languages = Object.fromEntries(
+    supportInfo.languages.map(({ name, parsers }) => [name, parsers])
   );
-  const options = supportInfo.options.reduce(
-    (obj, option) => ({
-      [option.name]: {
+
+  const options = Object.fromEntries(
+    supportInfo.options.map((option) => [
+      option.name,
+      {
         type: option.type,
         default: option.default,
         ...(option.type === "int"
@@ -28,9 +29,8 @@ function getCoreInfo() {
           ? { choices: option.choices.map((choice) => choice.value) }
           : null),
       },
-      ...obj,
-    }),
-    {}
+    ])
   );
+
   return { languages, options };
 }