Adrian Teodorescu is a professional software developer with more than 15 years' experience. Since 2009, Adrian has been devoting most of his time to Sencha libraries, and he is currently focused on building custom components for Ext JS and Sencha Touch. He developed a pivot table for Ext JS, which you can test on his website: www.mzsolutions.eu.

Li Xudong is a front-end developer in Beijing, China, and is skilled in JavaScript, CSS, HTML, NodeJS, and Python, and wants to make things better.