Array Indexing-javascript
Array Indexing
Arrays in JScript are sparse. That is, if you have an array with three elements that are numbered 0, 1, and 2, you can create element 50 without worrying about elements 3 through 49. If the array has an automatic length variable (see Intrinsic Objects for an explanation of automatic monitoring of array length), the length variable is set to 51, rather than to 4. You can certainly create arrays in which there are no gaps in the numbering of elements, but you aren't required to. In fact, in JScript, your arrays don't have to have numbered subscripts at all. In JScript, objects and arrays are essentially identical to each other. The real difference is not in the data, but rather in the way you address the members of an array or the properties and methods of an object.
Addressing Arrays
There are two main ways to address the members of an array. Ordinarily, you address arrays by using brackets. The brackets enclose either a numeric value or an expression that evaluates to a nonnegative integer. The following example assumes that the entryNum variable is defined and assigned a value elsewhere in the script.This method of addressing is equivalent to the method for addressing objects, though in object addressing, what follows the period must be the name of an actual property. If there is no such property, your code generates an error. The second way to address an array is to make an object/array that contains properties that are numbered, and then generate the numbers in a loop. The following example generates two arrays, one for the name and one for the address, from a listing in addressBook. Each of these contains four properties. An instance of theName, for example, built from the [Name1] through [Name4] properties of theListing, might contain "G." "Edward" "Heatherington" "IV", or "George" "" "Sand" "".theListing = addressBook[entryNum]; theFirstLine = theListing[1];
While this particular instance is short, and could easily have been written in the "dot" style of notation,that is, addressing theListing, theName, and theAddress as objects rather than as arrays, that is not always possible. Sometimes the particular property may not exist until run time, or there may be no way to know which one it will be in advance. For example, if the addressBook array were arranged by last name instead of by numbered listings, the user would probably be entering names "on the fly," while the script is running, to look people up. The following example assumes the existence of appropriate function definitions elsewhere in the script.theListing = addressBook[entryNum]; for (i = 1; i < 4; i++) { theName[i] = theListing["Name" + i]; theAddress[i] = theListing["Address" + i]; }This is associative addressing of the array, that is, addressing by means of fully arbitrary strings.theListing = addressBook[getName()]; theIndivListing = theListing[getFirstName()];
javascript Variable Scope
A local variable can have the same name as a global variable, but it is entirely distinct and separate. Consequently, changing the value of one variable has no effect on the other. Inside the function in which the local variable is declared, only the local version has meaning.
var aCentaur = "a horse with rider,"; // Global definition of aCentaur.
// JScript code, omitted for brevity.
function antiquities() // A local aCentaur variable is declared in this function.
{
// JScript code, omitted for brevity.
var aCentaur = "A centaur is probably a mounted Scythian warrior";
// JScript code, omitted for brevity.
aCentaur += ", misreported; that is, "; // Adds to the local variable.
// JScript code, omitted for brevity.
} // End of the function.
var nothinginparticular = antiquities();
aCentaur += " as seen from a distance by a naive innocent.";
/*
Within the function, the variable contains "A centaur is probably a mounted Scythian warrior,
misreported; that is, "; outside the function, the variable contains the rest of the sentence:
"a horse with rider, as seen from a distance by a naive innocent."
*/
It's important to note that variables act as if they
were declared at the beginning of whatever scope they exist in. Sometimes this
results in unexpected behaviors.
var aNumber = 100;
var withAdditive = 0;
withAdditive += aNumber; // withAdditive is now 100.
tweak();
withAdditive += aNumber; // withAdditive is now 200.
function tweak() {
var newThing = 0; // Explicit declaration of the newThing variable.
// The next statement, if it were not commented out, would generate an error.
// newThing = aNumber;
// The next statement assigns the value 42 to the local aNumber, implicitly declaring it.
aNumber = 42;
if (false) {
var aNumber; // This statement is never executed.
aNumber = "Hello!"; // This statement is never executed.
} // End of the conditional.
} // End of the function definition.
The statement that is commented out attempts to assign
the value of the local variable aNumber to the local variable
newThing. It fails, despite the fact that a local aNumber variable
is defined elsewhere in the function, and therefore exists throughout. The
aNumber variable does not have any assigned value at the point where this
statement occurs in the codehome page design-seo tips
have learned are the basics and there is still a lot more to be mastered. But you now have a good
foundation from which to build on.
First, it is a good idea to maintain order and structure in your HTML documents. By posting
well arranged documents you will not only show others your mastery of HTML but will also
make it considerably easier for yourself to keep an overview.
Stick to the standards and validate your pages. This cannot be stressed enough: Always write
clean XHTML, use a DTD and validate your pages on validator.w3c.org.
Give your page contents. Remember that HTML is a tool, which enables you to present
information on the Internet, so make sure that there is information to present. Pretty pages
may look nice but most people use the Internet to find information.
Avoid overloading your pages with heavy images and other fancy stuff you have found on
the Internet. It slows down the loading of the page and could be confusing for visitors. Pages
that take more than 20 seconds to load can lose up to 50% of their visitors.
Remember to add your website to search engines/directories so people other than your
closest family can find and enjoy it. On the front page of all search engines, you will find a
link to add new pages The most important is Google, but there are also others
like DMOZ, Yahoo, AltaVista, AlltheWeb and Lycos.
In this tutorial, you have learned to use Notepad, which is a simple and very easy to use
editor, but perhaps you will find it helpful to use a more advanced editor which gives a
better overview and more possibilities.
CSS can be used for much more than specifying font types and sizes. For example, you can add
colours and backgrounds. Here are some examples for you to experiment with:
<p style="color:green;">Green text</p>
<h1 style="background-color: blue;">Heading on blue background</h1>
<body style="background-image: url('http://www.html.net/logo.png');">
GIF images are usually best for graphics and drawings, while JPEG images are usually better for
photographs. This is for two reasons: first, GIF images only consist of 256 colours, while JPEG images
comprise of millions of colours and second, the GIF format is better at compressing simple images,
than the JPEG format which is optimized for more complex images. The better the compression, the
smaller the size of the image file, the faster your page will load. As you probably know from your
own experience, unnecessarily 'heavy' pages can be extremely annoying for the user.
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Top 5 XML Sitemap generators tools
http://www.sitemapdoc.com/
Online tool: will create XML Sitemaps with up to 500 URLs; this is often
sufficient for smaller sites
iGooMap
http://www.pointworks.de
Comprehensive XML Sitemap generator for the Mac platform
Google Sitemap Generator
http://code.google.com/p/googlesitemapgenerator
Google’s own Python-based XML Sitemap generator
SiteMap Generator
http://wonderwebware.com/sitemap-generator
Freeware XML Sitemap generator for the Windows OS
Mapsbuilder
http://www.mapsbuilder.com
XML Sitemap validators tools
Validomehttp://www.validome.org/google/validate
Can validate XML Sitemaps as well as XML Sitemap Index files;
free
XML Sitemap Validator
http://www.xml-sitemaps.com/validate-xml-sitemap.html
Free online validation for XML Sitemaps
Google Sitemap Checker
http://www.webmasterwebtools.com/sitemap-validation
Another free online validator
Check Crawling frequency
Orphan pages, deep links, and search engine traps are culprits of poor site indexing.
The use of Sitemaps can alleviate these situations, at least temporarily, to give you
enough time to fix the root of the problem.
Crawling frequency
One of the biggest benefits of using Sitemaps is in timely crawls or recrawls of your site
or just specific pages. XML Sitemap documents let you tell crawlers how often they
should read each page.
Sites using Sitemaps tend to be crawled faster on Yahoo! and Google. It takes Google
and Yahoo! minutes to respond to Sitemap submissions or resubmissions. This can be
very helpful for news sites, e-commerce sites, blogs, and any other sites that are constantly updating or adding new content.
or just specific pages. XML Sitemap documents let you tell crawlers how often they
should read each page.
Sites using Sitemaps tend to be crawled faster on Yahoo! and Google. It takes Google
and Yahoo! minutes to respond to Sitemap submissions or resubmissions. This can be
very helpful for news sites, e-commerce sites, blogs, and any other sites that are constantly updating or adding new content.
Page priority
As you will see later in this chapter, XML Sitemap Protocol allows webmasters to assign
a specific priority value for each URL in the XML Sitemap file. Giving search engines
suggestions about the importance of each page is empowering—depending on how
each search engine treats this value.
a specific priority value for each URL in the XML Sitemap file. Giving search engines
suggestions about the importance of each page is empowering—depending on how
each search engine treats this value.
Large sites
Using Sitemaps for large sites is important. Sites carrying tens of thousands (or millions)
of pages typically suffer in indexing due to deep linking problems. Sites with this many
documents use multiple Sitemaps to break up the different categories of content.
of pages typically suffer in indexing due to deep linking problems. Sites with this many
documents use multiple Sitemaps to break up the different categories of content.
HTML Sitemaps
Creating HTML Sitemaps can be straightforward for small sites. You can build HTML
Sitemaps using a simple text editor such as Notepad. For larger sites, it may make more
sense to use automated tools that will help you gather all your links. Google suggests
the following:
Offer a site map to your users with links that point to the important parts of your site. If
the site map is larger than 100 or so links, you may want to break the site map into
separate pages.
Sitemaps using a simple text editor such as Notepad. For larger sites, it may make more
sense to use automated tools that will help you gather all your links. Google suggests
the following:
Offer a site map to your users with links that point to the important parts of your site. If
the site map is larger than 100 or so links, you may want to break the site map into
separate pages.
HTML Sitemap Generators
If your site has hundreds or thousands of links, Sitemap generation tools will help you
to create multipage Sitemaps. Some of the tools available for this on the Internet
include:
• XML Sitemap Generator
• AutoMapIt
• Site Map Pro
Most Internet websites are small. Typically, a small business website would have only
a few links, and all the pages would have links to each other. Having a Sitemap in those
cases is still valuable, as most sites on the Internet are not designed by professionals,
nor do they knowingly employ SEO.
to create multipage Sitemaps. Some of the tools available for this on the Internet
include:
• XML Sitemap Generator
• AutoMapIt
• Site Map Pro
Most Internet websites are small. Typically, a small business website would have only
a few links, and all the pages would have links to each other. Having a Sitemap in those
cases is still valuable, as most sites on the Internet are not designed by professionals,
nor do they knowingly employ SEO.
Sitemap Location and Naming
XML Sitemaps can refer only to files in the folder in which they are placed, or files
located in any child folders of that folder. For example, a Sitemap corresponding to a
URL location of http://www.mydomain.com/sales/sitemap.xmlcan refer only to URLs
starting with http://www.mydomain.com/sales/.
located in any child folders of that folder. For example, a Sitemap corresponding to a
URL location of http://www.mydomain.com/sales/sitemap.xmlcan refer only to URLs
starting with http://www.mydomain.com/sales/.
You are also allowed to host Sitemaps on different domains. For this to work, you need
to prove the ownership of the domain hosting the Sitemap. For example, let’s say
DomainA.com hosts a Sitemap for DomainB.com. The location of the Sitemap is http://
domainA.com/sitemapDomainB.xml. All that is required is for DomainB.com to place
this URL anywhere within its robots.txtfile, using the Sitemapdirective.
Although your XML Sitemap can have arbitrary names, the recommended name is
sitemap.xml. Many people choose to name their XML Sitemaps another name. This is
to prevent rogue site scrapers from easily obtaining most, if not all, of the URLs for the
site.
Quick SEO Tips for website-What we do
Keyword Research
This process is based on your input and will be combined with Directory One’s
proprietary keyword research tools, which will identify the best possible key
phrases for optimizing your website.
proprietary keyword research tools, which will identify the best possible key
phrases for optimizing your website.
Metatags
Metatags include a title tag that contains the primary key phrase, which best
describes what the page is about, and is what you want to rank for. The title
tag appears in the blue strip at the top of your browser, so both your visitors
and the search engines are able to see it.
The next important Metatag is called the description, an eight to ten word
sentence or phrase that describes what the page is about.
describes what the page is about, and is what you want to rank for. The title
tag appears in the blue strip at the top of your browser, so both your visitors
and the search engines are able to see it.
The next important Metatag is called the description, an eight to ten word
sentence or phrase that describes what the page is about.
Heading Tags
Bold headings, which are called H1, H2, and H3 tags, appear directly above paragraphs on a web page todescribe what the paragraph is about. These tags are important to both search engines and website visitors
for exactly the same reason. People hardly ever read every word of a web page. So when your pages have
heading tags, visitors are able to quickly scan your pages and easily tell what they are about.
Anchor Text Links
These are links within your content based on a single key phrase that links directly to another page on yoursite that is also about that specific keyword or phrase.
Alt Tags
An alt tag is the text you see when you mouse-over a photo or graphic on a website. Alt tags are best whenthey contain a key phrase that describes in words what the picture is about.
Google Analytics
We generate and send Google Analytics reports to you by email that tell you exactly what keywords yourvisitors searched for and even which search engine they used to find your site.
Html Sitemap
We generate and add two sitemaps to your website. The first, called an html sitemap, appears as a web pageon your site. The html sitemap is helpful to both visitors and search engines when navigating through your
site.
XML Sitemap
The second is called an xml sitemap and it is a file that lists URLs for a site along with additional metadataabout each URL when it was last updated, how often it usually changes, and how important it is, relative to
other URLs in the site so that search engines can more intelligently crawl the site.
Website Redesign
Directory One will redesign and rebuild your current website to include proper html coding, cross browsercompatibility, CSS architecture, search engine friendly navigation and image optimization.
CSS Architecture
The way your site looks, for example font styles, colors and sizes will be separated from your content. Bycreating what are called include files; CSS enables much greater efficiency should website changes be
required in the future. In other words, when we change something once, it will automatically change
everywhere.
Site Structure
The file names that appear in the address field of your web browser will contain your primary key phrase forthat page separated by dashes.
Job at UP Rajya Vidyut Utpadan Nigam Limited
Job or Vacancy Description:
Online applications from Indian Citizens are invited for following 09 posts of Account Officer Trainee in UPRVUNL :
Account Officer (Trainee) : 09 posts (UR-4, OBC-3, SC-2), Pay Scale : Rs. 15600 – 39100 Rs. 5400, Age : 21 – 40 years as on 01/01/2014.
Application Fee : Assistant Engineer Rs.1000/- (Rs.700/- for SC) to be paid through ATM cum Debit Card/ Credit Card/ SBI Net banking OR Bank Challan Form (Payable at State Bank of India Branches).
How to Apply : Apply Online from 26/05/2014 to 25/06/2014. Take a copy of the submitted application and send it along with fee and required documents on or before 02/07/2014.
Tentative Last Date : 02-07-2014
View Details: http://www.uprvunl.org/recruitment_notices.htm