cluster: improve for-loop

PR-URL: #26336 Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>

Author: gengjiawen

lib/internal/cluster/master.js

@@ -81,10 +81,7 @@ cluster.setupMaster = function(options) {
  if (message.cmd !== 'NODE_DEBUG_ENABLED')
  return;
 
- var key;
- for (key in cluster.workers) {
- const worker = cluster.workers[key];
-
+ for (const worker of Object.values(cluster.workers)) {
  if (worker.state === 'online' || worker.state === 'listening') {
  process._debugProcess(worker.process.pid);
  } else {
@@ -231,11 +228,10 @@ cluster.disconnect = function(cb) {
  if (workers.length === 0) {
  process.nextTick(() => intercom.emit('disconnect'));
  } else {
- for (var key in workers) {
- key = workers[key];
-
- if (cluster.workers[key].isConnected())
- cluster.workers[key].disconnect();
+ for (const worker of Object.values(cluster.workers)) {
+ if (worker.isConnected()) {
+ worker.disconnect();
+ }
  }
  }