Merge pull request #642 from KenjiroAI/concurrency-robot-nodejs

Add Concurrency Robot for Node.js

Author: t2013anurag

concurrency_robot/node.js/robot.js

@@ -0,0 +1,20 @@
+'use strict';
+
+// Node.js is async. Using event-driven programming is a good choice
+const EventEmitter = require('events');
+const event = new EventEmitter();
+
+// Left
+event.on('left', () => {
+  console.log('left');
+  event.emit('right');
+});
+
+// Right
+event.on('right', () => {
+  console.log('right');
+  event.emit('left');
+});
+
+// Do first step
+event.emit('left');