Rob Gravelle

Apache Cordova Persistence Options Depending on your particular role where you work, you might be more inclined to develop you applications using either server-side or client-side coding languages. Even generalists who do both tend to lean more towards one or the other. What ever your preference, there is a mobile development framework for you. In […]

It used to be that you’d have to develop your Web apps for all of the different browser vendors. In particular, the Mozilla and Microsoft products were clearly at odds with each other. So much has changed since then. Now there are even more vendors! Thankfully, third-party frameworks have stepped in to ease our coding […]

Removing Elements from an Array in JavaScript Every new release of JavaScript (JS) includes new functions to achieve common programming tasks. Some of the newer additions include the Array indexOf() and DOM getElementsByClassName() functions. That being said, some browsers don’t keep up with the latest and greatest version of JavaScript or choose to implement their […]

Display Array Data in an a Tabular Format Most languages provide plenty of array utility functions from slicing(), merging, flattening(), filtering() and mapping(), but one thing that you typically have to do yourself is transform arrays to display them in a tabular format. Why would you want to do this? Presenting information in a table […]

I recently worked on a project where the client wanted to give visitors the ability to set the font to one specifically designed for people with dyslexia . I had visions of parsing the entire Document Object Model to set the font for every visible element, but to my surprise, it turned out to be […]

The wpdb class is defined in /wp-includes/wp-db.php. Unlike the wp_query class, the wpdb class should never be instantiated. Instead, WordPress provides a global object variable called $wpdb, which is an instantiated singleton of the wpdb class. To access $wpdb in a function, declare it as a global variable using the global keyword: function process_table_rows() { […]

Persistence in Java EE Applications A major enhancement in EJB 3.0 is the addition of the new Java Persistence API (JPA), which simplifies entity persistence and adds new capabilities to EJB 2.1. The Java Persistence API deals with the way relational data is mapped to Java objects called “persistent entities”, as well as the way […]

Create a Java EE Web Application using the Glassfish Server Not long after Java first released Java Beans, rumblings began about how darn complicated it was to implement. I remember learning it in School and the instructor practically pulled his hair out trying to get it to work! Soon after, the Spring Framework was introduced […]

Drag & Drop List Items Between DIVS using jQuery If you’ve ever completed on online survey there’s a good chance that you’ve encountered one of those questions where you choose some personality traits from a column and drag those attributes over to a box. It’s usually something along the lines of “Please select up to […]

Moving Meta Boxes in the WordPress Editor WordPress 3.8 introduced a new way to display posts in the former single-column layout using filters. A Filter is a function that processes data at certain points of the page lifecycle. As the name suggests, a filter may be employed to filter out and/or manipulate certain data before […]

Intro to WordPress Meta Boxes In WordPress, post information is edited within special components called meta boxes. Their purpose is to allow the user to edit or enter additional meta information that is in addition to the main post content. Existing meta boxes may be modified in terms of content and/or positioning to customize your […]

The Server-Sent Events (SSE) API is a standard that proposes a mechanism for servers to push content to the client. We got a taste of its server push capabilities in the Receive Updates from the Server Using the EventSource article. In that same article, we saw how to set the default timeout value from the […]