Chore: rxjs 실험용 디렉토리 추가

src/use-rxjs/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "use-rxjs",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "rxjs": "^7.8.0"
+  }
+}

src/use-rxjs/src/code.js

@@ -0,0 +1,21 @@
+const rxjs = require('rxjs');
+const { of } = require('rxjs'); // 생성함수
+const { map } = require('rxjs/operators'); // 연산함수
+
+const x = rxjs.of(1, 2, 3);
+
+x.subscribe(data => {
+  console.log(data);
+});
+// 1
+// 2
+// 3
+
+const y = of(1, 2, 3).pipe(map(x => x * 10));
+
+y.subscribe(data => {
+  console.log(data);
+});
+// 10
+// 20
+// 30