Fix eslint message and improve cluster examples readability

Author: tshemsedinov

cluster/master.js

@@ -7,6 +7,7 @@ console.log('Started master:', process.pid);
 
 const cpuCount = os.cpus().length;
 const workers = [];
+
 for (let i = 0; i < cpuCount; i++) {
   const worker = cluster.fork();
   console.log('Started worker:', worker.process.pid);
@@ -16,18 +17,18 @@ for (let i = 0; i < cpuCount; i++) {
 const task = [2, 17, 3, 2, 5, 7, 15, 22, 1, 14, 15, 9, 0, 11];
 const results = [];
 
-workers.forEach((worker) => {
+workers.forEach(worker => {
 
   worker.send({ task });
 
-  worker.on('exit', (code) => {
+  worker.on('exit', code => {
     console.log('Worker exited:', worker.process.pid, code);
   });
 
-  worker.on('message', (message) => {
+  worker.on('message', message => {
 
     console.log('Message from worker', worker.process.pid);
-    console.log(JSON.stringify(message));
+    console.log(message);
 
     results.push(message.result);
 

cluster/worker.js

@@ -6,10 +6,10 @@ console.log('Hello from worker', process.pid, cluster.worker.id);
 
 const caltulations = x => x * 2;
 
-process.on('message', (message) => {
+process.on('message', message => {
 
-  console.log('Message to worker ', process.pid)
-  console.log(JSON.stringify(message));
+  console.log('Message to worker ', process.pid);
+  console.log(message);
 
   const result = message.task.map(caltulations);
   process.send({ result });