Added example files

Author: readikus

child-processes/fork-child.js

@@ -0,0 +1,8 @@
+const fibonacci = (num) => num <= 1 ? 1 : fibonacci(num - 1) + fibonacci(num - 2)
+
+process.on('message', ({n}) => {
+  process.send({ fib: fibonacci(n), n })
+  // optional - there is no reason why this child process
+  // can't be called multiple times.
+  process.exit()
+})

child-processes/fork-parent.js

@@ -0,0 +1,30 @@
+const { fork } = require('child_process')
+
+const child1 = fork('fork-child')
+const child2 = fork('fork-child')
+const child3 = fork('fork-child')
+
+// send data to the child process to perform the calculation
+child1.send({ n: 5 });
+child2.send({ n: 10 });
+child3.send({ n: 45 });
+
+child1.on('message', (m) => {
+  console.log('PARENT child1 got message:', m);
+});
+child2.on('message', (m) => {
+  console.log('PARENT child2 got message:', m);
+});
+child3.on('message', (m) => {
+  console.log('PARENT child3 got message:', m);
+});
+
+child1.on('exit', () => {
+  console.log('child1 exited');
+});
+child2.on('exit', () => {
+  console.log('child2 exited');
+});
+child3.on('exit', () => {
+  console.log('child3 exited');
+});

child-processes/index.md

@@ -130,7 +130,6 @@ process.on('message', ({ n }) => {
 The parent process creates 3 child processes, and passes a range of numbers to them for calculating.
 
 ```javascript
-
 const { fork } = require('child_process')
 
 const child1 = fork('fork-child')