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doc: modernize and simplify cluster example #41626

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Jan 23, 2022
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doc: modernize and simplify cluster example #41626

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20 changes: 4 additions & 16 deletions doc/api/cluster.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1073,29 +1073,17 @@ list happens before the last `'disconnect'` or `'exit'` event is emitted.
```mjs
import cluster from 'cluster';

// Go through all workers
function eachWorker(callback) {
for (const id in cluster.workers) {
callback(cluster.workers[id]);
}
}
eachWorker((worker) => {
for (const worker of Object.values(cluster.workers)) {
worker.send('big announcement to all workers');
});
}
```

```cjs
const cluster = require('cluster');

// Go through all workers
function eachWorker(callback) {
for (const id in cluster.workers) {
callback(cluster.workers[id]);
}
}
eachWorker((worker) => {
for (const worker of Object.values(cluster.workers)) {
worker.send('big announcement to all workers');
});
}
```

Using the worker's unique id is the easiest way to locate the worker.
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