Know about Javascript Family

Hi JavaScript is most commonly used language in web. everybody uses javascript to make project or website more dynamic and realistic . There are so many libraries in JavaScript which I called family of JavaScript . are following .Try to learn these and make it use in your projects and websites for more productivity and enhancement.   

Node.js
Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications.
http://nodejs.org

Backbone.js 
Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface.
http://backbonejs.org/

Ember.js
ITs again a Framework for creating Web Application.
http://emberjs.com/

Paper.js
Paper.js is an open source vector graphics scripting framework that runs on top of the HTML5 Canvas. It offers a clean Scene Graph / Document Object Model and a lot of powerful functionality to create and work with vector graphics and bezier curves, all neatly wrapped up in a well designed, consistent and clean programming interface.
http://paperjs.org

Railway.js

Railway is the Node.JS MVC framework based on ExpressJS, fully ExpressJS-compatible. It allows you to build web applications in a similar manner as in Ruby On Rails. The main objective of the framework - web development without pain.
http://railwayjs.com/

JqueryUI
jQuery UI is a curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library. Whether you're building highly interactive web applications
http://jqueryui.com/

JSON

JSON is Javascript object notation . this is also a part of my learning . bcoz Its a popular data interchange format between clients and servers. 

Json is basically a lightweight data interchange format. earlier we used to with XML and HTML and many more .But Json is lightweight , Easy to understand , language independent and self describing.

As we know that Server cannot send any object directly to client . so it need any middleware which can understandable both the side  so through Json, server send any query as a string type and on client side it can easily be parsed as Object .So basically in laymen language json is a string , which can be easily converted into object and also object to string.

lets take a example. 

1.)

{
"student": [
{ "firstName":"tom" , "lastName":"decker" }, 
{ "firstName":"varun" , "lastName":"jain" }, 
{ "firstName":"lexia" , "lastName":"woodhouse" }
]

} 

2.)

'{
"employees": [{ "firstName":"John" , "lastName":"Doe" }, { "firstName":"Anna" , "lastName":"Smith" }, { "firstName":"Peter" , "lastName":"Jones" }]}'

so you can see how both look similar but First one is object and Second one is String. 

so object to string and string to object . 

JSON.stringify(data);  - this convert into string format.

JSON.parse(data);      - this convert into javascript object . 

Global Variables

why not to use global variable in javascript ?

JavaScript is not good in dealing with global variables .Global variable is a variable that is visible in every scope. javascript does not support Classes like  C /C++ , But we can use functions to encapsualte data.But use of global variable in a large project is not a good programming practice. it can be easily vulnerable for any large project. because being dependent on global variable degrade the reliability of the program . and can easily access to make changes in whole program . so generally we  avoid the use of global variable in javascript in large projects , it may b use in small programs .

Palindrome

Prime Number

string reverse

Binary Sort

arr = new Array()
arr[0] = 'Nano';
arr[1] = 'Indica';
arr[2] = 'BMW';
arr[3] = 'Innova';
arr[4] = 'Toyoto';
arr[5] = 'Alto';
arr[6] = 'Maruti';
arr[7] = 'Spark';
arr[8] = 'Chevrolet spark';

function binarySearch(arr, key){
var left = 0;
var right = arr.length - 1;
while (left <= right){
var mid = parseInt((left + right)/2);
if (arr[mid] == key)
return mid;
else if (arr[mid] < key)
left = mid + 1;
else
right = mid - 1;
}
return arr.length;
}
function search(){
var element= binarySearch(arr,'Innova');


document.write("The element you are searching is at the index number: "+ element);
}

javascript

 This is my progress log on java Script . I have started learning JavaScript and you can find simple programs created in JavaScript .