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Recursion can be slow, so we would rather not use a recursive function. We’d also like to minimize the number of database queries. Preferably, we’d have just one query for each activity. We’ll start by laying out our tree in a horizontal way. Start at the root node (‘Food’), and write a 1 to its left. We’ll call these numbers left and right (e.g. the left value of ‘Food’ is 1, the right value is 18). Before we continue, let’s see how these values look in our table: Note that the words ‘left’ and ‘right’ have a special meaning in SQL. Retrieve the Tree. Why is it better to develop in PHP with classes (OOP)? - PHP Classes blog. Introduction What are Object Oriented Programming Classes?
Why it is better to develop your PHP projects using OOP classes? When OOP Classes are not really necessary? How do I migrate my global code to use OOP classes? Conclusion Until recently I thought that articles like this were not necessary because I assumed that the basic concepts about Object Oriented Programming are well known and understood by most PHP programmers. Manually Build a Login Flow. Whether someone is not logged into your app or not logged into Facebook, you can use the Login dialog to prompt them to do both.
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jQuery ContentHover Plugin - Web development - Backslash. ContentHover is a small jQuery plugin that helps you show some hidden content on top of an element when the mouse hovers over it.
There are options to chose how your hover effect would appear, like fade in or slide in from any direction, you can change the opacity of the overlay etc. (Check out the options below) Usage Lets assume you have an image and want to show some text on top of it when the mouse hover over it. Add a div with class="contenthover" after the image: Then fire the plugin like this: (using the default options) It doesn't always have to be an image and a div. For demos check Examples & Usage. Options reference Here's the default options object with an explanation on every available option. Compatibility It has been tested on the latest versions of Firefox, Chrome, IE and Opera and seems to work well. 50+ Best jQuery Plugins of August 2013. jQuery is a multi-browser JavaScript library designed to simplify the client-side scripting of HTML, make event handling, animation, and Ajax much simpler with an easy-to-use API across various browsers.
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A flat menu with flip effect with CSS3's transform property. How.