Making a JS array unique isn’t a simple one-liner. This short article is for developers trying to make a JavaScript array unique without leaving holes in your array. Sorting an array in JavaScript is simple in most cases. Just call the sort() method on the array like so.

var my_array = [5, 2, 4, 6, 9];
my_array.sort();

One caveat to be aware of with this method of sorting is that it performs a non-lexicographical sort, which might be confusing for human users if you display it on screen. Depending on your requirements, you might want to change your sorting algorithm. Check out Brian Huisman’s article on the subject.

After sorting the array, the following snippet will remove any duplicate entries

for ( var i = 1; i < my_array.length; i++ ) {
    if ( my_array[i] === my_array[ i - 1 ] ) {
        my_array.splice( i--, 1 );
    }
}

This will iterate over each element in the array, attempting to find elements where the value is equal to the previous value. If they are equal, we have found a duplicate so we remove it using splice.

A complete function for sorting and making an array unique in JavaScript would look like the following

function sort_and_unique( my_array ) {
	my_array.sort();
	for ( var i = 1; i < my_array.length; i++ ) {
		if ( my_array[i] === my_array[ i - 1 ] ) {
					my_array.splice( i--, 1 );
		}
	}
	return my_array;
};

Image Loading Instructions

• Include jQuery
• Include jquery.krioImageLoader.js
• Instantiate the plugin on the wrapper
• $(“#test”).krioImageLoader();
• Watch it load

View the Demo
Download or fork on GitHub

The PayPal script will accept the users credentials on your website and send a request to PayPal to verify and bill the users information. From the script you can enter the amount to be billed, the timeframe, and any setup fees for the services.

Downloads, specific instructions and requirements for the script can be found on its GitHub page here.

For testing purposes you should setup a PayPal sandbox account. This will allow you to test your scripts. PayPal will verify the cards, however it will not attempt to charge them. PayPal will also provide dummy feedback into your PayPal user account page.

Download the script on GitHub.

The Crypt library provides classes and methods that help software/web developers to easily and securely encrypt data. The steps involved in encrypting data are detailed below.

1. Choose which library you want to use. The Rijndael is currently considered to be the most secure.
2. Create a new key that is used to decrypt the data later.
3. Encrypt the string/data.
4. Transfer the encrypting data.
5. Decrypt using the original key.

First, make sure to require the appropriate Ruby libraries net/http and uri. Next we will utilize the post_form method from HTTP, using the websites URL and a hash comprised of the POST key/value that you want to send in. You can use multiple values in the hash if necessary.

Running the parse method from URI will automatically format the URL you pass to the post_form method for easy manipulation.

The value returned and placed into the postData variable is a string representation of the source returned after your post request. This is a simple solution to a question that web developers often have.

Typically when making an HttpWebRequest with C# you would write something to this effect:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://URL.org");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

This will work fine, however your connection will not be anonymous. Using Tor, you can effectively create an anonymous connection. First, make sure to install Tor and run it. The typical Tor Windows install will install Privoxy along with Vidalia. To make your C# web request run through Tor, you need to override the default proxy property to contact Prioxy.

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://URL.org");
request.Proxy = new WebProxy("127.0.0.1:8118"); // default privoxy port for tor
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

127.0.0.1:8118 is the default address for Privoxy. Your HttpWebRequest will now be routed through Tor. Make sure that you do not have any firewalls blocking this default port.

First, you’ll need a MySQL result set. To do that you’ll need to select something from your database and loop through it like so:

$result = mysql_query("SELECT * FROM my_table");

while($row = mysql_fetch_assoc($result)) {

// inside the loop

}

The problem is, if you want to loop through the same result set again, you will get an error because the internal pointer is currently at the end of the result. You will need to put the pointer back at the beginning of the result set so that you can loop through it again.

You can do it with a helpful php function named mysql_data_seek.

mysql_data_seek($result, 0); // set the pointer of the result set back to the beginning.

while($row2 = mysql_fetch_assoc($result)) {

// inside the loop

}

This demonstrates how, as a PHP website developer, you can reset the pointer of a MySQL result set, which will allow you to iterate through the result set for a second time.

The ternary operator is a shorthand if/else statement. It allows developers to form conditions quickly and in a very readable fashion.

Here is the ternary syntax

(condition) ? true-stuff-here : false-stuff-here;

Here is an example of the ternary operator

$age = 20;

$response = ($age > 29) ? "He's in his thirties" : "He's not";

echo $response; // He's not

I hope you can see the usefulness in the ability for the ternary operator to easily perform conditional comparisons. Please however, refrain from using ‘nested ternary comparisons’ as the are very difficult to so read. It is so frowned upon by web developers that I’m not even going to post an example.

Sorting a PHP Array by Date

The first step is ensuring that the dates are placed into the array in proper format. When you add the date to the array, the best and most compatible way to do do is to run the PHP date function on the date value. This function works no matter what format the date is in, including a MySQL datetime column or a PHP timestamp.

So to enter dates into your array you can do something like:

$dateArray[] = date('Y-m-d');

//If you are iterating through something like a database with date's you could do something like:

$dateArray[] = date('Y-m-d', $row['date']);

One you have your date array set

All you need to do is run a  sorting function on the array.

Most recent date first

rsort($dateArray);

Oldest date first

sort($dateArray);

I hope this quick tutorial will help you in your website development and design endeavors!

The Apache Rewrite Code

RewriteEngine on

RewriteCond %{REQUEST_URI} !/theTempPage.php$

RewriteRule $ /theTempPage.php [R=307,L]

First we turn on the Rewrite engine (depending on your configuration .htaccess file it may already be on, however it won’t hurt Apache to include this if it is).

We then tell Apache to find pretty much everything after the domain name in a URL that is not equal to the maintenance page (in this case it is theTempPage.php).

If the URL is not equal to the condition, the user is forwarded to the maintenance page.