Java script at backend nodejs

Jun 12, 2015Download as pptx, pdf

5 likes1,874 views

This document outlines an agenda for discussing JavaScript at the backend using Node.js. The agenda includes explaining what Node.js is, installing Node.js, writing a simple "Hello World" program, running Node.js applications, exploring core Node.js modules like the file system and HTTP modules, and handling HTTP requests. Key points are installing Node.js from its website, using the file system and HTTP modules to interact with files and create an HTTP server, and using a request handler to return different responses based on the URL. The presenter is introduced as an author who works with JavaScript, Node.js, and related technologies.

Agenda
1. What?
2. Installing
3. Hello World.

Agenda
1. What?
2. Installing
3. Hello World.
4. How to run NodeJS Application.

Agenda
1. What?
2. Installing
3. Hello World.
4. How to run NodeJS Application.
5. NodeJS Internal Modules

Agenda
1. What?
2. Installing
3. Hello World.
4. How to run NodeJS Application.
5. NodeJS Internal Modules
○ fs(file-system) (sync vs async)

Agenda
1. What?
2. Installing
3. Hello World.
4. How to run NodeJS Application.
5. NodeJS Internal Modules
○ fs(file-system) (sync vs async)
○ http/https (HTTP Server with NodeJS)

About Me
Amit Thakkar
Tech Blogger @ CodeChutney.in
JavaScript Lover
Working on MEAN Stack
Twitter: @amit_thakkar01
LinkedIn: linkedin.com/in/amitthakkar01
Facebook: facebook.com/amit.thakkar01

Installing
https://nodejs.org/download/

You can checkout Demo form:
https://github.com/AmitThakkar/JavaScript-at-Backend-NodeJS

Node Internal Modules: fs
(function (require) {
var fs = require('fs');
fs.unlinkSync('test2');
console.log('successfully deleted test2');
})(require);

Node Internal Modules: fs
(function (require) {
var fs = require('fs');
fs.unlink('test', function (err) {
if (err) throw err;
console.log('successfully deleted test');
});
})(require);

Node Internal Modules: http
var http = require("http");
var server = http.createServer(requestHandler);
server.listen(9999, function() {
console.log('Server running at http://localhost:9999/');
});
function requestHandler(request, response) {
console.log("Request received.");
response.writeHead(200, {"Content-Type": "text/plain"});
response.write("Hello World");
response.end();
}

Handling HTTP Request
var requestHandler = function (request, response) {
var data = "";
switch (request.url) {
case "/" :
data = "HelloWorld";
break;
case "/me" :
data = "This is Me!";
break;
default :
data = "You lose in space";
}
response.writeHead(200, {"Content-Type": "text/plain"});
response.write(data);
response.end();
};

References:
Create Basic HTTP Server with Node.js

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This document outlines a presentation about using Packer to automate the creation of machine images. The agenda includes an introduction to Packer, when it should be used, a technical dive into how it works, and a demo. Packer is described as being declarative, transparent, open source, reusable by customizing variables, and supporting multiple clouds. The technical dive explains the process of creating a template, saving it locally, granting access to a cloud provider, launching a new machine to install packages on, shutting it down to create an image, and registering that image to the cloud.

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The document discusses AngularJS core services like $location and $http, creating custom services and directives. It provides an agenda that includes discussing core services like $location for getting URL information and $http for making HTTP requests. It then discusses creating a custom TODO service and a keyEnter directive. It encourages reviewing the sample TODO application integrated with a REST API on GitHub for examples of implementing these concepts.

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This document discusses AngularJS directives and the model-view-view-model (MVVM) pattern. It begins with an agenda that includes MVVM, directives like ng-show/ng-hide, ng-click, and ng-repeat. It then provides an example of using controllers and models with MVVM in AngularJS. Directives are explained and examples are given for ng-show/ng-hide, ng-click, and ng-repeat. Finally, it references a TODO app demo and asks if there are any questions.

A different thought AngularJSAmit Thakkar

The document discusses why JavaScript frameworks are needed and provides an overview of AngularJS. It notes that JS frameworks help with form validation, DOM manipulation, templating, and AJAX calls. AngularJS is highlighted because it was developed by Google, is actively maintained, implements MVW and other design patterns, and features two-way data binding. The document concludes with a basic "Hello World" AngularJS program to demonstrate binding an input to real-time text output.

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The document discusses building user interfaces with React, a JavaScript library for building user interfaces created by Facebook. It provides an overview of React fundamentals and walks through building a to-do app as an example, demonstrating components like AddToDoBox, ToDoList, and ToDo to display and manage to-do items. The to-do app allows users to add, remove, and view to-do tasks using React components and managing local component state.

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This document outlines a presentation on JavaScript design patterns, including the constructor, module, revealing module, facade, promise/deferred, and decorator patterns. The presentation provides examples and demos of each pattern to show how they can be implemented in JavaScript to write organized, reusable code. The target audience is professional developers looking to improve their knowledge of design patterns and apply them with JavaScript.

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