Here it is:

.alignnone {
    margin: 5px 20px 20px 0;
}
 
.aligncenter, div.aligncenter {
    display:block;
    margin: 5px auto 5px auto;
}
 
.alignright {
    float:right;
    margin: 5px 0 20px 20px;
}
 
.alignleft {
    float:left;
    margin: 5px 20px 20px 0;
}
 
.aligncenter {
    display: block;
    margin: 5px auto 5px auto;
}
 
a img.alignright {
    float:right;
    margin: 5px 0 20px 20px;
}
 
a img.alignnone {
    margin: 5px 20px 20px 0;
}
 
a img.alignleft {
    float:left;
    margin: 5px 20px 20px 0;
}
 
a img.aligncenter {
    display: block;
    margin-left: auto;
    margin-right: auto
}
 
.wp-caption {
    background: #fff;
    border: 1px solid #f0f0f0;
    max-width: 96%; /* Image does not overflow the content area */
    padding: 5px 3px 10px;
    text-align: center;
}
 
.wp-caption.alignnone {
    margin: 5px 20px 20px 0;
}
 
.wp-caption.alignleft {
    margin: 5px 20px 20px 0;
}
 
.wp-caption.alignright {
    margin: 5px 0 20px 20px;
}
 
.wp-caption img {
    border: 0 none;
    height: auto;
    margin:0;
    max-width: 98.5%;
    padding:0;
    width: auto;
}
 
.wp-caption p.wp-caption-text {
    font-size:11px;
    line-height:17px;
    margin:0;
    padding:0 4px 5px;
}

Obviously you can change the styles to suit but it matches what users see when adding posts and pages.

For more information check out the WordPress codex page: http://codex.wordpress.org/CSS

After some research, I came across a Eval Math by Miles Kaufmann. It has not been updated since 2005 and is slightly out of date. So I have decided to create a new open source project to create a better class.

As it is at the moment, initially I had no idea how to approach the problem. The first thing i needed to understand was how computers can evaluate mathematical expressions.

Eventually I came across infix notation and postfix notation. Only getting to A level Maths, I had no idea what they were. After battling through some heavy maths, I realised infix is the way we normally write expressions

Infix: 3 + 4 – 2
Postfix: 3 4 + 2 -

At first it looks odd but once explained it is simple. Here how it works:

1. (3) is a number.
2. (4) is another number
3. (+) is an operation so take the previous 2 numbers (3 + 4 = 7).
   So the expression becomes: 7 2 - 
4. (7) is a number.
5. (2) is a number.
6. (-) is an operation so take the previous 2 numbers (7 – 2 = 5).
7. Only one number left, that is the answer (5).
8. So “3 + 4 – 2″ = “3 4 + 2 -” = 5

This is a simple example but the point is to make the expression easier for a computer to evaluate. Postfix removes the need for brackets in expression as precedence is sort by the order of the numbers and operations.

Few more examples:

Infix: -2 * (a + 5) + (-2 + 2)
Postfix: -2 a 5 + * -2 2 + + 

Infix: 2a^2 + 2a + 2
Postfix: 2 a 2 ^ * 2 a * + 2 +

Once I understood this, I started writing an algorithm to convert infix to postfix using this wiki page http://en.wikipedia.org/wiki/Shunting-yard_algorithm.

Understanding the algorithm was alittle difficult at first but I eventually got my head around it.

And so I managed to get a working class that will evaluate math expressions.

The code is hosted at https://bitbucket.org/maca134/mathevaluator and anyone is welcome to contribute to the code.

At the moment the class will handle the following operations:

• Addition (+)
• Subtraction (-)
• Multiplication (*)
• Division (/)
• Power (^)
• Modulus (%)
• Parentheses

$results = MathEvaluator::e('2a + (12 / 2) - b * -2', 
	array('a' => 2, 'b' => 4)
);
 
array(4) {
	["result"]=>
	float(18)
	["infix"]=>
	string(22) "2a + (12 / 2) - b * -2"
	["postfix"]=>
	string(23) "2 a * 12 2 / + b -2 * -"
	["vars"]=>
	array(4) {
		["a"]=>
		string(1) "2"
		["b"]=>
		string(1) "4"
	}
}

I created this to solve that problem. The plugin uses the WordPress image manager, so you can add already uploaded images too a gallery.

Download: http://wordpress.org/extend/plugins/wp-simple-galleries/

See demo below.

It was become more popular than I originally anticipated. So I have decide to devote some more time and add some extra features, as people seem to want them.

The plugin basicly has a shortcode that inserts a registration form into any page/post.

Check it out at http://wordpress.org/extend/plugins/shopp-customer-register

Here is my Bitbucket repository https://bitbucket.org/maca134/shopp-customer-register/wiki/Home

So in true hacker style I have come up with a small Javascript snippet that will unfollow everyone on the page.

All it does is look for the Unfollow links and triggers the click event. Wait a second. Repeat.

function pausecomp(ms) {
	ms += new Date().getTime();
	while (new Date() < ms){}
}
$('.twitter-users li').each(function() {
	$(this).find('div.action a').click();
	pausecomp(1000);
});

Just to make life abit easier, there is also a nice bookmarklet below, just drag it to your bookmark bar: Unfollow All