Ian Johnson is the author of Tributary - an open source live-coding environment designed for prototyping data visualizations with D3. He also co-organizes the SF Bay Area d3 Meetup and makes educational D3 videos.
Bay Area D3 and Tributary
Now that the charts are styled appropriately, Ian takes some time to review the application's code. He reviews the SVG code, binding and non-binding APIs, and the application architecture.