In this week's Programming By Stealth, Bart Busschots teaches us the last two concepts in Mustache, one of which is a real head bender and for me at least, the second was almost as hard. The first is how you can add an optional third argument to a Mustache view which is actually a function within a function. It's a very meta concept. The second is the use of Mustache Partials which are templates within templates. I expect you'll follow along faster than I did but I _think_ I got there in the end!

You can find Bart's shownotes for this installment at [www.bartbusschots.ie/...](https://www.bartbusschots.ie/s/2019/03/24/pbs-74-of-x-more-mustaches/)