Java Script

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 What is Java Script ?

JavaScript is the world's most popular programming language.JavaScript is the programming language of the Web.JavaScript is easy to learn.This tutorial will teach you JavaScript from basic to advanced.

JavaScript is a scripting or programming language that allows you to implement complex features on web pages — every time a web page does more than just sit there and display static information for you to look at — displaying timely content updates, interactive maps, animated 2D/3D graphics, scrolling video jukeboxes, etc. — you can bet that JavaScript is probably involved. It is the third layer of the layer cake of standard web technologies, two of which (HTML and CSS) we have covered in much more detail in other parts of the Learning Area.



Why do we Need JavaScript?
Whether you plan to specialize in front-end, back-end, or full-stack development, JavaScript is a crucial programming language for any web developer. Without JavaScript, we wouldn’t have the dynamic and interactive web pages that have become the standard user experience we all know, love, and rely on.

 


What is JavaScript Designed For?

JavaScript was designed by Brendan Eich at Netscape as a way to remove the limitation of static pages on the web. Eich set out to create a scripting language for the web that used the syntax of Java, another programming language.JavaScript was designed for:

  • Speed: it’s faster to execute code within a web browser in its native language than it is to execute code on the server.
  • Dynamic pages: pages that users can interact with weren’t possible before JavaScript’s inception.
  • Reducing memory use: executing the code in the browser helps free up space on servers, which helps cut costs.
  • Building responsive user interfaces: almost all social media user interfaces rely on JavaScript.
  • Reloading certain parts of the page independently: those suggestions when you start typing in Google’s search bar are all thanks to JavaScript.
  • Responsive content: when you change your browser window’s size, JavaScript lets the size of the content on the page change with it.
  • Form validation: required fields are enforced by JavaScript, so that you don’t miss any information when you’re shopping online.
  • Autocomplete: JavaScript helps save us from manually inputting our email address every time we fill out an online form.
  • Playing audio and video: remember Flash? JavaScript’s audio and video capabilities are the reason it’s now obsolete. Later, HTML was updated to handle media files too, but JavaScript did it first.

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Socket Programming

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What is Socket Programming ?  A   socket   is a communications connection point (endpoint) that you can name and address in a network. Socket programming shows how to use socket APIs to establish communication links between remote and local processes. The processes that use a socket can reside on the same system or different systems on different networks. Sockets are useful for both stand-alone and network applications. Sockets allow you to exchange information between processes on the same machine or across a network, distribute work to the most efficient machine, and they easily allow access to centralized data. Socket application program interfaces (APIs) are the network standard for TCP/IP. A wide range of operating systems support socket APIs. i5/OS sockets support multiple transport and networking protocols. Socket system functions and the socket network functions are thread safe.                                  Programmers who use Integrated Language Environment® (ILE) C can re
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