TL;DR: there are good arguments for leading commas, but I recommend using trailing commas for consistency.

We didn't take an opinionated stance on comma placement when writing Mozilla's SQL Style Guide probably to avoid a quagmire. I'm trying to figure out where I stand now, so I wrote it …

I gave a talk at the Open Data Science Conference a few weeks ago titled: Practical Strategies for Data Storytelling. I have more to say on the subject, but in the meantime you can see my slides and speaker notes here.

For the last two years, I've hosted a biweekly …

As I moved up my company’s career ladder, my job description became more ambiguous.

I stepped back to take a look at my work, and I was surprised to find that my biggest wins hadn’t come from technical feats or shipped code. Instead, I realized that most of …