From 002e0c079f14b48bec32cf424055ad743f26881a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A4rt=20Kalmo?= <mart.kalmo@gmail.com>
Date: Sat, 8 Apr 2017 09:17:59 +0300
Subject: [PATCH] added promises exercise

---
 express-examples/express2.js |  2 ++
 promises.js                  | 30 ++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 promises.js

diff --git a/express-examples/express2.js b/express-examples/express2.js
index 21dbefc..3fac856 100644
--- a/express-examples/express2.js
+++ b/express-examples/express2.js
@@ -3,6 +3,8 @@
 const express = require('express');
 const app = express();
 
+app.use(express.static('./'));
+
 app.get('/api/contacts', getContacts);
 app.get('/api/contacts/:id', getContact);
 
diff --git a/promises.js b/promises.js
new file mode 100644
index 0000000..7f3fe75
--- /dev/null
+++ b/promises.js
@@ -0,0 +1,30 @@
+
+var promise = Promise.resolve(1); // vs. Promise.reject(new Error('failed'));
+
+promise.then(result => {
+    console.log('1: ' + result);
+
+    return getData(result);
+}).then(result => {
+    console.log('2: ' + result);
+
+    return 1;
+}).then(result => {
+    // no return
+}).then(result => {
+    throw new Error('sth bad happened');
+}).then(result => {
+    // skipped
+}).catch(error => {
+    // process error
+    // throw error
+    // return 1
+}).then(result => {
+    // executed if catch
+    // does not throw
+});
+
+function getData() {
+    return Promise.resolve('some data');
+    // return Promise.reject(new Error('no data'));
+}