Node.js 101 with Rami Sayar
Presented on September 18 2014 at
FITC's Web Unleashed Toronto 2014 Conference
More info at www.fitc.ca
OVERVIEW
Node.js is a runtime environment and library for running JavaScript applications outside the browser. Node.js is mostly used to run real-time server applications and shines through its performance using non-blocking I/O and asynchronous events. This talk will introduce you to Node.js by showcasing the environment and its two most popular libraries: express and socket.io.
TARGET AUDIENCE
Beginner web developers
ASSUMED AUDIENCE KNOWLEDGE
Working knowledge of JavaScript and HTML5.
OBJECTIVE
Learn how to build a chat engine using Node.js and WebSockets.
FIVE THINGS AUDIENCE MEMBERS WILL LEARN
Node.js environment and basics
Node Package Manager overview
Web Framework, express, basics
WebSockets and Socket.io basics
Building a chat engine using Node.js
Join us to discover how to use the PHP frameworks and tools you love in the Cloud with Heroku. We will cover best practices for deploying and scaling your PHP apps and show you how easy it can be. We will show you examples of how to deploy your code from Git and use Composer to manage dependencies during deployment. You will also discover how to maintain parity through all your environments, from development to production. If your apps are database-driven, you can also instantly create a database from the Heroku add-ons and have it automatically attached to your PHP app. Horizontal scalability has always been at the core of PHP application design, and by using Heroku for your PHP apps, you can focus on code features, not infrastructure.
Getting instantly up and running with Docker and SymfonyAndré Rømcke
A look into how you can start to use Docker today with ready made setup with php7, nginx, redis, blackfire and so on. How you may extend it, and integrating it into your continuous integration workflow, and how you can setup a continuous deployment workflow using for instance Travis-CI.
Quicklink: https://legacy.joind.in/19070
Join us to discover how to use the PHP frameworks and tools you love in the Cloud with Heroku. We will cover best practices for deploying and scaling your PHP apps and show you how easy it can be. We will show you examples of how to deploy your code from Git and use Composer to manage dependencies during deployment. You will also discover how to maintain parity through all your environments, from development to production. If your apps are database-driven, you can also instantly create a database from the Heroku add-ons and have it automatically attached to your PHP app. Horizontal scalability has always been at the core of PHP application design, and by using Heroku for your PHP apps, you can focus on code features, not infrastructure.
Getting instantly up and running with Docker and SymfonyAndré Rømcke
A look into how you can start to use Docker today with ready made setup with php7, nginx, redis, blackfire and so on. How you may extend it, and integrating it into your continuous integration workflow, and how you can setup a continuous deployment workflow using for instance Travis-CI.
Quicklink: https://legacy.joind.in/19070
A soup to nuts presentation on using Composer and repository servers to manage and leverage shared code libraries for personal projects to the largest enterprise.
SaltConf14 - Oz Akan, Rackspace - Deploying OpenStack Marconi with SaltStackSaltStack
This talk will demonstrate how to use Salt Mine leveraging Salt grains to create several environments (parallel universes) that decide how to run the same Salt formulas with different outcomes. "Roles” will be defined in an OpenStack Marconi (queuing as a service) deployment and a few formulas will be shared to demonstrate the concept.
Arnold Bechtoldt, Inovex GmbH Linux systems engineer - Configuration Manageme...SaltStack
Arnold gave this presentation at the Secure Linux Admin Conference in Berlin Germany. He provides an overview of what configuration management systems do, explains the fundamentals of SaltStack and provides a look inside.
Dockerizing Symfony2 application. Why Docker is so cool And what is Docker? And what are Containers? How they works? What are the ecosystem of Docker? And how to dockerize your web application (can be based on Symfony2 framework)?
openQA hands on with openSUSE Leap 42.1 - openSUSE.Asia Summit ID 2016Ben Chou
The openQA framework consists of two parts, which are tracked in separate git repos. The OS-autoinst test engine and the front-end with web-interface, test-scheduler and other high-level logic, which is part of this repo.
Nginx 0.8.x + php 5.2.13 (fast cgi) setup web serverwruben
nginx [engine x] is a HTTP and reverse proxy server, as well as a mail proxy server written by Igor Sysoev. It has been running for more than five years on many heavily loaded Russian sites including Rambler (RamblerMedia.com).
Ansible has huge potential, also working with docker. These slides give an introduction to how Ansible works and can be used to automate and improve your infrastructure setup.
Save 10% off ANY FITC event with discount code 'slideshare' - http://www.fitc.ca
OVERVIEW
Node.js is a runtime environment and library for running JavaScript applications outside the browser. Node.js is mostly used to run real-time server applications and shines through its performance using non-blocking I/O and asynchronous events. This talk will introduce you to Node.js by showcasing the environment and its two most popular libraries: express and socket.io.
TARGET AUDIENCE
Beginner web developers
ASSUMED AUDIENCE KNOWLEDGE
Working knowledge of JavaScript and HTML5.
OBJECTIVE
Learn how to build a chat engine using Node.js and WebSockets.
FIVE THINGS AUDIENCE MEMBERS WILL LEARN
Node.js environment and basics
Node Package Manager overview
Web Framework, express, basics
WebSockets and Socket.io basics
Building a chat engine using Node.js
A soup to nuts presentation on using Composer and repository servers to manage and leverage shared code libraries for personal projects to the largest enterprise.
SaltConf14 - Oz Akan, Rackspace - Deploying OpenStack Marconi with SaltStackSaltStack
This talk will demonstrate how to use Salt Mine leveraging Salt grains to create several environments (parallel universes) that decide how to run the same Salt formulas with different outcomes. "Roles” will be defined in an OpenStack Marconi (queuing as a service) deployment and a few formulas will be shared to demonstrate the concept.
Arnold Bechtoldt, Inovex GmbH Linux systems engineer - Configuration Manageme...SaltStack
Arnold gave this presentation at the Secure Linux Admin Conference in Berlin Germany. He provides an overview of what configuration management systems do, explains the fundamentals of SaltStack and provides a look inside.
Dockerizing Symfony2 application. Why Docker is so cool And what is Docker? And what are Containers? How they works? What are the ecosystem of Docker? And how to dockerize your web application (can be based on Symfony2 framework)?
openQA hands on with openSUSE Leap 42.1 - openSUSE.Asia Summit ID 2016Ben Chou
The openQA framework consists of two parts, which are tracked in separate git repos. The OS-autoinst test engine and the front-end with web-interface, test-scheduler and other high-level logic, which is part of this repo.
Nginx 0.8.x + php 5.2.13 (fast cgi) setup web serverwruben
nginx [engine x] is a HTTP and reverse proxy server, as well as a mail proxy server written by Igor Sysoev. It has been running for more than five years on many heavily loaded Russian sites including Rambler (RamblerMedia.com).
Ansible has huge potential, also working with docker. These slides give an introduction to how Ansible works and can be used to automate and improve your infrastructure setup.
Save 10% off ANY FITC event with discount code 'slideshare' - http://www.fitc.ca
OVERVIEW
Node.js is a runtime environment and library for running JavaScript applications outside the browser. Node.js is mostly used to run real-time server applications and shines through its performance using non-blocking I/O and asynchronous events. This talk will introduce you to Node.js by showcasing the environment and its two most popular libraries: express and socket.io.
TARGET AUDIENCE
Beginner web developers
ASSUMED AUDIENCE KNOWLEDGE
Working knowledge of JavaScript and HTML5.
OBJECTIVE
Learn how to build a chat engine using Node.js and WebSockets.
FIVE THINGS AUDIENCE MEMBERS WILL LEARN
Node.js environment and basics
Node Package Manager overview
Web Framework, express, basics
WebSockets and Socket.io basics
Building a chat engine using Node.js
Save 10% off ANY FITC event with discount code 'slideshare'
See our upcoming events at www.fitc.ca
Node.js: The What, The How and The When
with Richard Nieuwenhuis
An introduction into Node as a programming platform. This presentation introduces Node - its history, its architecture, the eco system of npm modules and tools and its place in the enterprise IT architecture and infrastructure. The Express framework is introduced, some core modules, the notion of asynchronous operations and the use of module async and of the ES6 Promises. Server Sent Events are introduced for a server to client push application. The interaction with MongoDB is demonstrated. The presentation contains many code samples. Note that the presentation is associated with sources and workshop materials in GitHub: https://github.com/lucasjellema/nodejs-introduction-workshop-may2017 .
Intro to node.js - Ran Mizrahi (27/8/2014)Ran Mizrahi
Node.js is a platform built on Chrome V8 javascript runtime engine for building fast and scalable, non-blocking, real-time and network applications. In this session Ran will introduce node.js and how to develop large code bases using it. He'll cover the following aspects:
• What is node.js?
• Apache vs. Nginx performance (One thread per connection vs. event loop) and what it has to do with node.js.
• Why node was written in Javascript?
• Main tools and frameworks (Express, socket.io, mongoose etc.)
• TDD/BDD with node.js using mocha and Chai.
Ran Mizrahi, Founder of CoCycles, Passionate entrepreneur and software engineer who loves to continuously innovate and deliver meaningful products while having true fun with the right team.
My Node.js workshop from Sela's Developer Conference 2015.
In the Workshop we covered The basics Node.js api's and the express web application framework.
“Node's goal is to provide an easy way to build scalable Network programs”
Asynchronous i/o framework
Core in c++ on top of v8
Rest of it in javascript
Swiss army knife for network Related stuffs
Can handle thousands of Concurrent connections with Minimal overhead (cpu/memory) on a single process
It’s NOT a web framework, and it’s also NOT a language
• Created by Ryan Dahl in 2009
• Development && maintenance sponsored by Joyent
• License MIT
• Last release : 0.10.31
• Based on Google V8 Engine
• +99 000 packages
Microsoft is working hard to modernize the .NET Platform. There are great new frameworks and tools coming, such as .NET Core and ASP.NET Core. The amount of new things is overwhelming, with multiple .NET Platforms (.NET Framework, Unified Windows Platform, .NET Core), multiple runtimes (CoreCLR, CLR, CoreRT), multiple compilers (Roslyn, RyuJIT, .NET Native and LLILC) and much more. This session will bring you up to speed on all this new Microsoft technology, focusing on .NET Core.
But, we will also take a look at the first framework implementation on top op .NET Core for the Web: ASP.NET Core 1.0. You will learn about ASP.NET Core 1.0 and how it is different from ASP.NET 4.6. This will include Visual Studio 2015 support, cross-platform ASP.NET Core and command-line tooling for working with ASP.NET Core and .NET Core projects.
After this session you know where Microsoft is heading in the near future. Be prepared for a new .NET Platform.
Has the traditional intro to event looped servers (thanks Ryan!) with a couple of examples of why I think node.js is particularly exciting today. Code for the demos can be found at https://github.com/davidpadbury/node-intro.
Introducing Node.js in an Oracle technology environment (including hands-on)Lucas Jellema
This presentation introduces Node.js in a few simple, straightforward steps. First, Node.js is presented as just JavaScript on the browser, then HTTP handling is discussed with core module http and subsequently using Express. Running Oracle JET from Node.js is explained. The implementation of APIs - REST services supporting various [operations on] resources is discussed. The single-thread nature of Node.js is presented, along with the essentials of asynchrous programming, working with callbacks and using the async module. The Node Oracle DB Database driver is introduced and demonstrated. Finally, further steps are suggested. This presentation is supported by a set of resources that constitute a three hour hands on session - sources are in GitHub https://github.com/lucasjellema/sig-nodejs-amis-2016.
React has been named the front-end library to learn in 2016! React Native has also picked up tremendous steam as a way to build cross-platform apps with React. In this talk, Rami will do a quick 5 minute introduction to React's core concepts. Following, Rami will introduce React Native, discuss the differences between React & React Native, and show you how to build a simple Android application. By the end of this talk, you will have a greater grasp of the ecosystem and leave with new tools in your developer arsenal.
Responsive images are crucial to delivering stunning responsive web sites. Now that the <picture> element and srcset feature have found their way into every browser with to a certain degree following a common standard, there is no excuse for refusing to add art-directed responsive images to your grunt, gulp or webpack build flow or backend CMS/blog. This talk will explore the state of the art in building art-directed responsive images and will showcase several tools and techniques that web designers can use to automate art-directed responsive images.
Have you ever cried yourself to sleep unable to find the cause of a horrendous bug in your node app? Cry no more, your tears will be reshaped into blinding swords as we explore uncharted territories laced with mystical creatures.
JavaScript debugging is an often avoided topic due to the uncertainty of how best to accomplish it and the lack of powerful introspective tools. This talk will explore new territory and showcase tools that help you debug complex and difficult issues in your node or frontend app. Libraries and tools such as node-inspector, Time-Travel Debugging, Visual Studio Code, vorlon.js, Vantage and memory leak catchers will be used to slay dragons.
No more shall you fear building complex apps with JavaScript!
An Intense Overview of the React EcosystemRami Sayar
React has been named the front-end library to learn in 2016 however few people talk about the React without mentioning Flux (or Redux or React Native or Relay). In this talk, we will explore the ecosystem of tools and libraries that surround React. We will look at the various Flux implementations (including a short explanation of Flux) like Redux, at react-router, at some of the reactive database or reactive API libraries and finally at everyday tools and techniques that make the React developer happy. By the end of this talk, you will have a greater grasp of the ecosystem and leave with new tools in your developer arsenal.
Animations on the web have a storied history and no consistent approach. Using CSS animations is still considered an experimental technology but much can be created already. In this talk, we will explore how to create beautiful CSS animations, cover the compatibility between different browsers, share some ready-libraries for quickly animating your elements and share tools to help you build animations faster.
Have you ever cried yourself to sleep unable to find the cause of a horrendous bug in your WordPress site? Cry no more, your tears will be reshaped as blinding swords as we explore uncharted territories laced with mystical creatures.
Debugging is an often avoided topic due to the uncertainty of how best to accomplish it and the lack of powerful introspective tools. This talk will explore new territory and showcase tools that help you debug complex and difficult issues in your WordPress site.
FITC - Here Be Dragons: Advanced JavaScript DebuggingRami Sayar
Have you ever cried yourself to sleep unable to find the cause of a horrendous bug in your node app? Cry no more, your tears will be reshaped into blinding swords as we explore uncharted territories laced with mystical creatures.
JavaScript debugging is an often avoided topic due to the uncertainty of how best to accomplish it and the lack of powerful introspective tools. This talk will explore new territory and showcase tools that help you debug complex and difficult issues in your node or frontend app. Libraries and tools such as node-debugger, Visual Studio Code, vorlon.js, and memory leak catchers will be used to slay dragons.
No more shall you fear building complex apps with JavaScript!
OVERVIEW
Twitter Bootstrap is a wildly popular HTML and CSS framework for building websites and web applications. It is the number 1 project on GitHub. Bootstrap supports responsive web design, allowing the layout of your page to adapt to the device (desktop, tablet, mobile). This talk will introduce you to the basics of using Bootstrap and show you how to build responsive web layouts to build your own app.
TARGET AUDIENCE
Beginner web developers
ASSUMED AUDIENCE KNOWLEDGE
Working knowledge of HTML5 and CSS3.
OBJECTIVE
Learn how to use Twitter Bootstrap to quickly build a beautiful, responsive web app.
FIVE THINGS AUDIENCE MEMBERS WILL LEARN
Twitter Bootstrap basics
Bootstrap CSS basics
Bootstrap responsive layouts
Bootstrap components
JavaScript Bootstrap plugins
Data visualization is crucial to understanding the big data being generated by apps and services. Data visualization toolkits such as D3.js and charting toolkits are immensely popular but it remains difficult to create meaningful dashboards or usable analytics tools or clear data visualizations. This talk will discuss data visualization principles, present best practices, showcase excellent visualizations in practice, and share useful tips and mistakes learned.
OpenFOAM solver for Helmholtz equation, helmholtzFoam / helmholtzBubbleFoamtakuyayamamoto1800
In this slide, we show the simulation example and the way to compile this solver.
In this solver, the Helmholtz equation can be solved by helmholtzFoam. Also, the Helmholtz equation with uniformly dispersed bubbles can be simulated by helmholtzBubbleFoam.
AI Pilot Review: The World’s First Virtual Assistant Marketing SuiteGoogle
AI Pilot Review: The World’s First Virtual Assistant Marketing Suite
👉👉 Click Here To Get More Info 👇👇
https://sumonreview.com/ai-pilot-review/
AI Pilot Review: Key Features
✅Deploy AI expert bots in Any Niche With Just A Click
✅With one keyword, generate complete funnels, websites, landing pages, and more.
✅More than 85 AI features are included in the AI pilot.
✅No setup or configuration; use your voice (like Siri) to do whatever you want.
✅You Can Use AI Pilot To Create your version of AI Pilot And Charge People For It…
✅ZERO Manual Work With AI Pilot. Never write, Design, Or Code Again.
✅ZERO Limits On Features Or Usages
✅Use Our AI-powered Traffic To Get Hundreds Of Customers
✅No Complicated Setup: Get Up And Running In 2 Minutes
✅99.99% Up-Time Guaranteed
✅30 Days Money-Back Guarantee
✅ZERO Upfront Cost
See My Other Reviews Article:
(1) TubeTrivia AI Review: https://sumonreview.com/tubetrivia-ai-review
(2) SocioWave Review: https://sumonreview.com/sociowave-review
(3) AI Partner & Profit Review: https://sumonreview.com/ai-partner-profit-review
(4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review
How Recreation Management Software Can Streamline Your Operations.pptxwottaspaceseo
Recreation management software streamlines operations by automating key tasks such as scheduling, registration, and payment processing, reducing manual workload and errors. It provides centralized management of facilities, classes, and events, ensuring efficient resource allocation and facility usage. The software offers user-friendly online portals for easy access to bookings and program information, enhancing customer experience. Real-time reporting and data analytics deliver insights into attendance and preferences, aiding in strategic decision-making. Additionally, effective communication tools keep participants and staff informed with timely updates. Overall, recreation management software enhances efficiency, improves service delivery, and boosts customer satisfaction.
Exploring Innovations in Data Repository Solutions - Insights from the U.S. G...Globus
The U.S. Geological Survey (USGS) has made substantial investments in meeting evolving scientific, technical, and policy driven demands on storing, managing, and delivering data. As these demands continue to grow in complexity and scale, the USGS must continue to explore innovative solutions to improve its management, curation, sharing, delivering, and preservation approaches for large-scale research data. Supporting these needs, the USGS has partnered with the University of Chicago-Globus to research and develop advanced repository components and workflows leveraging its current investment in Globus. The primary outcome of this partnership includes the development of a prototype enterprise repository, driven by USGS Data Release requirements, through exploration and implementation of the entire suite of the Globus platform offerings, including Globus Flow, Globus Auth, Globus Transfer, and Globus Search. This presentation will provide insights into this research partnership, introduce the unique requirements and challenges being addressed and provide relevant project progress.
Quarkus Hidden and Forbidden ExtensionsMax Andersen
Quarkus has a vast extension ecosystem and is known for its subsonic and subatomic feature set. Some of these features are not as well known, and some extensions are less talked about, but that does not make them less interesting - quite the opposite.
Come join this talk to see some tips and tricks for using Quarkus and some of the lesser known features, extensions and development techniques.
Atelier - Innover avec l’IA Générative et les graphes de connaissancesNeo4j
Atelier - Innover avec l’IA Générative et les graphes de connaissances
Allez au-delà du battage médiatique autour de l’IA et découvrez des techniques pratiques pour utiliser l’IA de manière responsable à travers les données de votre organisation. Explorez comment utiliser les graphes de connaissances pour augmenter la précision, la transparence et la capacité d’explication dans les systèmes d’IA générative. Vous partirez avec une expérience pratique combinant les relations entre les données et les LLM pour apporter du contexte spécifique à votre domaine et améliorer votre raisonnement.
Amenez votre ordinateur portable et nous vous guiderons sur la mise en place de votre propre pile d’IA générative, en vous fournissant des exemples pratiques et codés pour démarrer en quelques minutes.
Software Engineering, Software Consulting, Tech Lead.
Spring Boot, Spring Cloud, Spring Core, Spring JDBC, Spring Security,
Spring Transaction, Spring MVC,
Log4j, REST/SOAP WEB-SERVICES.
Introducing Crescat - Event Management Software for Venues, Festivals and Eve...Crescat
Crescat is industry-trusted event management software, built by event professionals for event professionals. Founded in 2017, we have three key products tailored for the live event industry.
Crescat Event for concert promoters and event agencies. Crescat Venue for music venues, conference centers, wedding venues, concert halls and more. And Crescat Festival for festivals, conferences and complex events.
With a wide range of popular features such as event scheduling, shift management, volunteer and crew coordination, artist booking and much more, Crescat is designed for customisation and ease-of-use.
Over 125,000 events have been planned in Crescat and with hundreds of customers of all shapes and sizes, from boutique event agencies through to international concert promoters, Crescat is rigged for success. What's more, we highly value feedback from our users and we are constantly improving our software with updates, new features and improvements.
If you plan events, run a venue or produce festivals and you're looking for ways to make your life easier, then we have a solution for you. Try our software for free or schedule a no-obligation demo with one of our product specialists today at crescat.io
May Marketo Masterclass, London MUG May 22 2024.pdfAdele Miller
Can't make Adobe Summit in Vegas? No sweat because the EMEA Marketo Engage Champions are coming to London to share their Summit sessions, insights and more!
This is a MUG with a twist you don't want to miss.
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
Providing Globus Services to Users of JASMIN for Environmental Data AnalysisGlobus
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Listen to the keynote address and hear about the latest developments from Rachana Ananthakrishnan and Ian Foster who review the updates to the Globus Platform and Service, and the relevance of Globus to the scientific community as an automation platform to accelerate scientific discovery.
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Unleash Unlimited Potential with One-Time Purchase
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Top 7 Unique WhatsApp API Benefits | Saudi ArabiaYara Milbes
Discover the transformative power of the WhatsApp API in our latest SlideShare presentation, "Top 7 Unique WhatsApp API Benefits." In today's fast-paced digital era, effective communication is crucial for both personal and professional success. Whether you're a small business looking to enhance customer interactions or an individual seeking seamless communication with loved ones, the WhatsApp API offers robust capabilities that can significantly elevate your experience.
In this presentation, we delve into the top 7 distinctive benefits of the WhatsApp API, provided by the leading WhatsApp API service provider in Saudi Arabia. Learn how to streamline customer support, automate notifications, leverage rich media messaging, run scalable marketing campaigns, integrate secure payments, synchronize with CRM systems, and ensure enhanced security and privacy.
1. Rami Sayar - @ramisayar
Technical Evangelist
Microsoft Canada
2. • Node.js Basics and Environment
• Node Package Manager Overview
• Web Framework Express Basics
• WebSockets and Socket.io basics
• Building a Chatroom using Node.js
3. • Working knowledge of JavaScript and HTML5.
Note: Slides will be made available.
4.
5.
6.
7.
8.
9.
10. • It was created by Ryan Dahl in 2009.
• Still considered in beta phase.
• Latest version is v0.10.31.
• Open-source!
• Supports Windows, Linux, Mac OSX
11. Node.js is a runtime environment and library for running
JavaScript applications outside the browser.
Node.js is mostly used to run real-time server applications and
shines through its performance using non-blocking I/O and
asynchronous events.
12. • Node is great for streaming or event-based real-time
applications like:
• Chat Applications
• Dashboards
• Game Servers
• Ad Servers
• Streaming Servers
• Online games, collaboration tools or anything meant to be real-time.
• Node is great for when you need high levels of concurrency but
little dedicated CPU time.
• Great for writing JavaScript code everywhere!
14. • Five years after its debut, Node is the third most popular
project on GitHub.
• Over 2 million downloads per month.
• Over 20 million downloads of v0.10x.
• Over 81,000 modules on npm.
• Over 475 meetups worldwide talking about Node.
Reference: http://strongloop.com/node-js/infographic/
18. “A programming paradigm in which the flow of the program is
determined by events such as user actions (mouse clicks, key
presses) or messages from other programs.” – Wikipedia
19. • Node provides the event loop as part of the language.
• With Node, there is no call to start the loop.
• The loop starts and doesn’t end until the last callback is
complete.
• Event loop is run under a single thread therefore sleep() makes
everything halt.
20. var fs = require('fs');
var contents = fs.readFileSync('package.json').toString();
console.log(contents);
21. var fs = require('fs');
fs.readFile('package.json', function (err, buf) {
console.log(buf.toString());
});
22. • Event loops result in callback-style programming where you
break apart a program into its underlying data flow.
• In other words, you end up splitting your program into smaller
and smaller chunks until each chuck is mapped to operation
with data.
• Why? So that you don’t freeze the event loop on long-running
operations (such as disk or network I/O).
24. • A function will return a promise for an object in the future.
• Promises can be chained together.
• Simplify programming of async systems.
Read More: http://spin.atomicobject.com/2012/03/14/nodejs-
and-asynchronous-programming-with-promises/
25. step1(function (value1) {
step2(value1, function (value2) {
step3(value2, function (value3) {
step4(value3, function (value4) {
// Do something with value4
});
});
});
});
Q.fcall(promisedStep1)
.then(promisedStep2)
.then(promisedStep3)
.then(promisedStep4)
.then(function (value4) {
// Do something with value4
})
.catch(function (error) {
// Handle any error from all above steps
})
.done();
26. • James Coglan – “Callbacks are imperative,
promises are functional: Node’s biggest missed
opportunity”
• https://blog.jcoglan.com/2013/03/30/callbacks-are-
imperative-promises-are-functional-nodes-biggest-
missed-opportunity/
27.
28. • Allows you to listen for “events” and assign functions to run
when events occur.
• Each emitter can emit different types of events.
• The “error” event is special.
• Read More: http://code.tutsplus.com/tutorials/using-nodes-
event-module--net-35941
29. • Streams represent data streams such as I/O.
• Streams can be piped together like in Unix.
var fs = require("fs");
// Read File
fs.createReadStream("package.json")
// Write File
.pipe(fs.createWriteStream("out.json"));
30. • Node.js has a simple module and dependencies loading
system.
• Unix philosophy -> Node philosophy
• Write programs that do one thing and do it well -> Write modules that
do one thing and do it well.
31. • Call the function “require” with the path of the file or directory
containing the module you would like to load.
• Returns a variable containing all the exported functions.
var fs = require("fs");
32. • Official package manager for Node.
• Bundled and installed automatically with the environment.
Frequent Usage:
• npm install --save package_name
• npm update
35. • Reads package.json
• Installs the dependencies in the local node_modules folder
• In global mode, it makes a node module accessible to all.
• Can install from a folder, tarball, web, etc…
• Can specify dev or optional dependencies.
36. Async is a utility module which provides straight-forward, powerful
functions for working with asynchronous JavaScript.
async.map(['file1','file2','file3'], fs.stat, function (err, results) {
// results is now an array of stats for each file
});
async.filter(['file1','file2','file3'], fs.exists, function (results) {
// results now equals an array of the existing files
});
async.parallel([
function () { },
function () { }
], callback);
async.series([
function () { },
function () { }
]);
37. Request is designed to be the simplest way possible to make
http calls. It supports HTTPS, streaming and follows redirects by
default.
var request = require('request');
request('http://www.microsoft.com', function (error, response, body) {
if (!error && response.statusCode == 200) {
console.log(body);
}
});
38. • Socket.IO enables real-time bidirectional event-based
communication using WebSockets.
• Requires HTTP module.
• Can broadcast to other sockets.
39. • Express is a minimal, open source and flexible node.js web app
framework designed to make developing websites, web apps
and APIs much easier.
• Express helps you respond to requests with route support so
that you may write responses to specific URLs. Express allows
you to support multiple templating engines to simplify
generating HTML.
40. var express = require('express');
var app = express();
app.get('/', function (req, res) {
res.json({message:'hooray! welcome to our api!'});
});
app.listen(process.env.PORT || 8080);
41.
42.
43. • Node.js Basics and Environment
• Node Package Manager Overview
• Web Framework Express Basics
• WebSockets and Socket.io basics
• Building a Chatroom using Node.js
JavaScript is an extremely popular language and is credited with being one of the driving forces that turned the web into the dynamic wonderland that it is today. What you can do in a browser nowadays, rivals all others.
Node.js lets you unify the programming language used by your app - no longer do you need a different language for your backend, you can use JavaScript throughout. If your background is in building and design websites and web app frontends in HTML, CSS and JavaScript, you don’t need to pick up another language to develop complex data-driven back-ends for your apps.
V8 is an open source JavaScript engine developed by Google.
V8 is written in C++ and is embedded in Google Chrome.
Node.js runs on V8.
The idea behind Promise-based APIs is that a function will return a promise for an object in the future. Promises can be chained together and as each promise is fulfilled the next promise in line is executed. If a promise can’t be fulfilled it raises an error which can be handled, otherwise the chain of promises stops execution.