The $() factory function: in JQuery

All type of selectors available in jQuery, always start with the dollar sign and parentheses: $().

The factory function $() makes use of following three building blocks while selecting elements in a given document:

jQuery	Description
Tag Name:	Represents a tag name available in the DOM. For example $('p')selects all paragraphs in the document.
Tag ID:	Represents a tag available with the given ID in the DOM. For example$('#some-id') selects the single element in the document that has an ID of some-id.
Tag Class:	Represents a tag available with the given class in the DOM. For example $('.some-class') selects all elements in the document that have a class of some-class.

All the above items can be used either on their own or in combination with other selectors. All the jQuery selectors are based on the same principle except some tweaking.

NOTE: The factory function $() is a synonym of jQuery() function. So in case you are using any other JavaScript library where $ sign is conflicting with some thing else then you can replace $sign by jQuery name and you can use function jQuery() instead of $().

The Document Ready Event in JQuery

You might have noticed that all jQuery methods in our examples, are inside a document ready event:

$(document).ready(function(){
// jQuery methods go here...
});
This is to prevent any jQuery code from running before the document is finished loading (is ready).

It is good practice to wait for the document to be fully loaded and ready before working with it. This also allows you to have your JavaScript code before the body of your document, in the head section.

Here are some examples of actions that can fail if methods are run before the document is fully loaded:
Trying to hide an element that is not created yet
Trying to get the size of an image that is not loaded yet

Tip: The jQuery team has also created an even shorter method for the document ready event:

$(function(){
// jQuery methods go here...
});
Use the syntax you prefer. We think that the document ready event is easier to understand when reading the code.

How to use JQuery library

Here we can see that how to use JQuery in our HTML Page. If you don't want to download and host jQuery yourself, you can include it from a CDN (Content Delivery Network). Both Google and Microsoft host jQuery. To use jQuery from Google or Microsoft, use one of the following in alternate downloading:

JQuery Introduction

jQuery is a fast and concise JavaScript Library created by John Resig in 2006 with a nice motto:Write less, do more.
jQuery simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development.
jQuery is a JavaScript toolkit designed to simplify various tasks by writing less code. Here is the list of important core features supported by jQuery:

• DOM manipulation: The jQuery made it easy to select DOM elements, traverse them and modifying their content by using cross-browser open source selector engine calledSizzle.
• Event handling: The jQuery offers an elegant way to capture a wide variety of events, such as a user clicking on a link, without the need to clutter the HTML code itself with event handlers.
• AJAX Support: The jQuery helps you a lot to develop a responsive and feature-rich site using AJAX technology.
• Animations: The jQuery comes with plenty of built-in animation effects which you can use in your websites.
• Lightweight: The jQuery is very lightweight library - about 19KB in size ( Minified and gzipped ).
• Cross Browser Support: The jQuery has cross-browser support, and works well in IE 6.0+, FF 2.0+, Safari 3.0+, Chrome and Opera 9.0+
• Latest Technology: The jQuery supports CSS3 selectors and basic XPath syntax.

How to install jQuery ?
This is very simple to do require setup to use jQuery library. You have to carry two simple steps:
Go to the download page to grab the latest version available. Now put downloaded jquery-1.3.2.min.js file in a directory of your website, e.g. /jquery. The downloaded file name jquery-1.3.2.min.js may vary for your version. Your minified version would be kind of unreadable which would not have any new line or unnecessary words in it. The jQuery does not require any special installation and very similar to JavaScript, we do not need any compilation or build phase to use jQuery.

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programm to reading values from keyboard into an arraylist untill 'z' keyword enterd, stops reading and than sorting them in ascending order.

import java.io.*;
import java.util.*;

public class ArraysOne {

public static void main(java.lang.String[] args) 
{
//int i;
ArrayList al=new ArrayList();
try{
Scanner input = new Scanner(System.in);

int check=0;
while(true){
check = input.nextInt();
if(check == 'z' || check=='Z') break;
al.add(check);
}

} catch(Exception e){
e.printStackTrace();}

Iterator itr=al.iterator();
while(itr.hasNext()){
Object i=itr.next();
System.out.println(i);
}
int j=al.size();
System.out.println("Size"+j);

Collections.sort(al);
System.out.println("ArrayList is sorted");

for(Integer temp: al){
System.out.println(temp);

}
/*for(int i=j;i>=i-1;i--){
for(int k=i-1;k>=;k--){
if(al.get(i)al.get(k)){
System.out.println(al.get(k));}
else{ System.out.println(al.get(i));}
}
}*/

}

}

Adding two Arrays and finding the third array is positive or negative???

import java.util.*;
import java.lang.*;
import java.io.*;
class AddArrays1
{
public static void main(String[] args)
{
//Scanner sc=new Scanner(System.in);

int a[]={1,2,3};
int b[]={2,3,-4};
int c[]=new int[3];
for(int i=0;i{
c[i]=a[i]+b[i];
System.out.println(c[i]);
}
for (int i=0; i{
if (c[i] > 0) {
System.out.println(c[i]+ " is positive");
} else {
System.out.println(c[i] + " is not positive");
}
}
}
}

How To Troubleshoot Your System For Memory Problems In Windows 7

Windows 7 includes built-in features to help you identify and diagnose problems with memory.

If you suspect a computer has a memory problem that isn’t being automatically detected, you can run the Windows Memory Diagnostics utility by completing the following steps:

Step 1: - Click Start, type mdsched.exe in the Search box, and then press Enter

Step 2: - Choose whether to restart the computer and run the tool immediately or schedule the tool to run at the next restart.

Windows Memory Diagnostics runs automatically after the computer restarts and performs a standard memory test automatically. If you want to perform fewer or more tests, press F1, use the Up and Down arrow keys to set the Test Mix as Basic, Standard, or Extended, and then press F10 to apply the desired settings and resume testing.

When testing is completed, the computer restarts automatically. You’ll see the test results when you log on.

Note that if a computer crashes because of failing memory, and Windows Memory Diagnostics detects this, the system will prompt you to schedule a memory test the next time the computer is restarted.