Adds first example for RxJS (#1)

experiments/01-rxjs-intro/index.js

@@ -0,0 +1,16 @@
+const { Observable } = require( "rxjs");
+
+const foo = new Observable(subscriber => {
+  console.log('Hello');
+  subscriber.next(42);
+  subscriber.next(43);
+  setTimeout( () => { subscriber.next(45) }, 1000);
+});
+
+foo.subscribe(x => {
+  console.log(x);
+});
+
+foo.subscribe(y => {
+  console.log(y);
+});

experiments/01-rxjs-intro/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "01-rxjs-intro",
+  "version": "1.0.0",
+  "description": "First steps with RxJS",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/olange/learning-streams/experiments/01-rxjs-intro"
+  },
+  "keywords": [
+    "streams",
+    "observable",
+    "rxjs",
+    "experiment"
+  ],
+  "author": "Olivier Lange",
+  "license": "BSD-3-Clause",
+  "dependencies": {
+    "rxjs": "^6.4.0"
+  }
+}