LEcture15

Author: abhishek97

Lecture15/async/index.js

@@ -0,0 +1,35 @@
+const generatePromise = (n, v) => new Promise(resolve => {
+  setTimeout(() => {
+    resolve(v)
+  }, n * 1000)
+})
+
+// const download = generatePromise(5, "File Data")
+// const resize = generatePromise(2, "Resized File")
+// const upload = generatePromise(1, "uploaded File")
+
+
+// download.then(resize).then(upload)
+
+// download.then(file => {
+//   const splitedFile = file.split(',') 
+
+//   return [resize, splitedFile]
+// }).then(([resizedFile, splitedFile]) => {
+
+// })
+
+
+async function fn () {
+  console.log("start")
+
+  await generatePromise(5, "File Data")
+
+  console.log("done Promise")
+
+  await generatePromise(8, "Another Promise")
+
+  console.log("Done Function")
+}
+
+console.log(fn())

Lecture15/express-todo-hbs/index.js

@@ -0,0 +1,48 @@
+const express = require('express')
+const app = express()
+
+app.set('view engine', 'hbs')
+
+app.use(express.urlencoded({extended: true}))
+app.use(express.static(__dirname + '/public'))
+
+let bands = [{
+    id: 1,
+    title: 'Nirvana',
+    striked: false
+}, {
+    id: 2,
+    title: 'Black Sabbath',
+    striked: true
+}]
+
+app.get('/', (req, res) =>  {
+    res.render('index', { bands })
+})
+
+app.post('/', (req, res) => {
+    bands.push({
+        id: bands.length + 1,
+        title: req.body.title,
+        striked: false
+    })
+    res.redirect('/')
+})
+
+app.post('/update/:id', (req, res) => {
+    const band = bands.find(b => b.id == req.params.id)
+    band.title = req.body.title
+    band.striked = !(req.body.striked == "true")
+    res.redirect('/')
+})
+
+app.post('/delete', (req, res) => {
+    bands = bands
+        .filter(b => !b.striked)
+        .map((el, index) => ({ ...el, id: index + 1}))
+    res.redirect('/')
+})
+
+app.listen(3000, function () {
+    console.log("Listening on 30000")
+})