Technology Report on Node.js
Q1. What is the selected technology? (Basic concepts, definitions, features)
Traditionally websites were made using HTML and CSS. Over the time when websites became heavier and complicated, scripting languages like PHP, Python, and Perl were used with front end developed in previous mentioned technologies (HTML and CSS). JavaScript was introduced and made the web pages more interactive. With time and increased usage, jQuery was introduced. These were libraries of JavaScript functions used frequently in the web pages. But still people using these technologies were called “JavaScript User” and not “JavaScript Developer”. Node.js allows you to run JavaScript code on server side, outside the browser.
Node.js is a platform built on Chrome's JavaScript runtime. It uses Google’s V8 VM, same runtime environment for JavaScript used by Chrome. Features like event-driven, nonblocking I/O model make it ideal for data-intensive, real-time applications running across distributed devices.
The asynchronous nature of the scripting language and being identical to JavaScript are key assets, which makes it much easier to express concurrency in the application.
Event Driven, Single Thread.
Most important concept of Node.js is that it is event driven and it runs its event on a single thread. That means that there are several events in the event loop but only one will function at a time. An event might send a callback to another event but only one event will occur. This saves multithreaded overhead. A request comes at node.js web server and it is handled to a listener object to process the response. Meanwhile the web server will remain ready to accept any new requests. The previous response handling will remain in a que...
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...e used to share code between the browser and backend. JavaScript is on its way to become a really universal language.
And the last reason is raw speed. V8 is constantly pushing the boundaries in being one of the fastest dynamic language interpreters on the planet. In addition to that, node's I/O facilities are really lightweight, fully utilizing the system's I/O capacities as possible.
Package management - Node Package Manager (NPM)
Node Package Manager is the basis of deployment systems for Node.js and underlies the many PaaS (platform-as-a-service) providers for Node.js, making it easy to deploy smaller applications between providers. NPM can help get benefit by getting and managing thousands of open source packages so one does not have build everything all by self.
Q5. How to use this technology (procedure, tips and guidelines)
Syntax
Tutorial
Demo video
Ajax electronics ' problem is that they have too much accounts receivable, inventory and liabilities, and I recommend them to stop selling defibrillators and focus on industrial sensors, which they will have lower competition and a gross margin up to 40%, and get some with financial and administrative skills on the board or as an manager.
scripts for web pages. Yet coding, looking the algorithmic depths, getting close to the machine,
The internet works on the basis that some computers act as ‘servers’. These computers offer services for other computers that are accessing or requesting information, these are known as ‘clients’. The term “server” may refer to both the hardware and software (the entire computer system) or just the software that performs the service. For example, Web server may refer to the Web server software in a computer that also runs other applications or it may refer to the computer system dedicated only to the Web server applicant. For example, a large Web site could have several dedicated Web servers or one very large Web server.
A presentation given on the 9th of January 2014 as a part of the SF/JS Field Trip
“Netscape's Client Side State definition:Cookies are a general mechanism which server side connections (such as CGI scripts) can use to both store and retrieve information on the client side of the connection. The addition of a simple, persistent, client-side state significantly extends the capabilities of Web-based client/server applications.”Kington, Andy, Andy’s HTTP Cookie Notes, Available from http://www.illuminatus.com/cookie_pages/ [modified 6 June 1997, cited 14 March, 1999]
A V8 engine was designed with eight cylinders. These cylinders were not in a straight line, they were in two sets of four on each side of the V. Some pros to owning an eight cylinder car or truck is having a lot of power and low end torque; along with towing capability and smooth operation. Having a lot of power in a car or truck is what most teenagers prefer. Trucks with a V8 have more towing capability than a truck with a V6. Cars are a different story. Most of the time cars don't usually tow trailers and boats. Why would a car need a V8 engine, is a question that is asked often. The reason a car would need that type of engine is to make it fast, and has more torque. All track racing cars have a V8 in them. Most sport cars have some type of V8 engine. Although the fuel economy of a V8 might not be as good as a V6, what you lose in fuel economy you gain in other areas. That's one of the only downsides to owning a
It’s a known fact that Java script has emerged as a de-facto scripting language in the World Wide Web. Type Script is an attempt from Microsoft to replace or build upon Java script due to the challenges while dealing with complex programming. Now what is it all about? TypeScript is a superset of JavaScript aimed to develop large scale JS applications. It is essentially syntax for the next version of java script. That means you can write regular JavaScript inside of Type Script and i...
The Imperial Vault of Heaven is located along the Danbi Bridge, the bridge which connects the Circular Mound Altar and Hall of Prayer for Good Harvest. It is a large, circular pavilion that was used for housing tablets that emperors used during a ceremony to worship Heaven. Tablets are still kept along the walls of the pavilion today. Like the other pavilions in the park, the circular shape is meant to represent Heaven. It has three unique features: the Echo Wall, the Three Echo Stone, and the Dialogue Stone.
designing and coding it. It was essential that NT be very stable in order to be a
It simplifies the storage and processing of large amounts of data, eases the deployment and operation of large-scale global products and services, and automates much of the administration of large-scale clusters of computers.
Many different types of programming languages are used to write programs for computers. The languages are called "codes". Some of the languages include C++, Visual Basic, Java, XML, Perl, HTML, and COBOL. Each of the languages differs from each other, and each is used for specific program jobs. HTML and JAVA are languages used to build web pages for the Internet. Perl and XML can produce codes that block students from getting on certain inappropriate web pages on their school server. One of the most prominent programming languages of the day would have to be C++.
Much of the focus of Web 2.0 is on new business models, however it definitely has some technical features, with the implementation and innovation of new technologies and standards within the web platform. Much of the focus in the Web 2.0 and Social Networking space has been toward customer interaction; that is, how to collaborate better with customers through blogs, forums, or Facebook and MySpace websites, how to increase product awareness or drive sales with marketing campaigns, or how to increase customer satisfaction using Ajax so that pages are updated almost automatically. Web 2.0 websites are those that have these features : Their user interface is improved and enables end users to access and view data in a quicker and more dynamic way by using AJAX to provide a richer user interface. By using XMLHttpRequest object in the background web pages can be more functional and natural. They use HTML and CSS standards.
There were skeptics that said the language was a dud and would never catch on, but now more people are learning Java Script then ever before.JavaScript is used within HTML tags so that the page setup in already present when the Java Script starts to run. There are many different uses for Java Script on the Net. It can be used to make mail forms that a customer or person trying to input information can use. The program will allow the user to input information, then it will automatically send that info to a designated email address with the click of a button. It can also be used to put a password on a certain web page; a user trying to enter the page must then input the correct commands and passwords to enter the page.
Java was first created by Patrick Naughton, Mike Sheridan, and James Gosling in 1994. However, they started writing the code for it four years earlier in 1990. They originally started making it to try and make a new and more practical way of computing. Originally, Java was called “Oak”, and it was being made for the Green Project in Sun Microsystems (about.com). Using Oak, they wrote a browser called WebRunner, and later renamed it HotJava. This browser was the first browser that was dynamic, capable of having moving objects on the page, and having executable content within the page (oracle.com). With the internet era beginning to take hold, having over sixteen million internet users, people begin to notice Java through the web by next year.
Web 2.0 is branded by open source and freeware. It is used a lot in blogs, tags, wikis, RSS.