infra(unicorn): no-instanceof-array

.eslintrc.js

@@ -60,7 +60,6 @@ module.exports = defineConfig({
     'unicorn/no-array-reduce': 'off',
     'unicorn/no-await-expression-member': 'off',
     'unicorn/no-for-loop': 'off',
-    'unicorn/no-instanceof-array': 'off',
     'unicorn/no-negated-condition': 'off',
     'unicorn/no-object-as-default-parameter': 'off',
     'unicorn/no-useless-switch-case': 'off',

src/modules/system/index.ts

@@ -179,22 +179,15 @@ export class SystemModule {
    * @since 3.1.0
    */
   fileExt(mimeType?: string): string {
-    if (typeof mimeType === 'string') {
-      const mimes = this.faker.definitions.system.mimeTypes;
-      return this.faker.helpers.arrayElement(mimes[mimeType].extensions);
-    }
-
     const mimeTypes = this.faker.definitions.system.mimeTypes;
-    const extensionSet = new Set<string>();
 
-    Object.keys(mimeTypes).forEach((m) => {
-      if (mimeTypes[m].extensions instanceof Array) {
-        mimeTypes[m].extensions.forEach((ext) => {
-          extensionSet.add(ext);
-        });
-      }
-    });
+    if (typeof mimeType === 'string') {
+      return this.faker.helpers.arrayElement(mimeTypes[mimeType].extensions);
+    }
 
+    const extensionSet = new Set(
+      Object.values(mimeTypes).flatMap(({ extensions }) => extensions)
+    );
     const extensions = Array.from(extensionSet);
     return this.faker.helpers.arrayElement(extensions);
   }