Huh, never seen that before. And as usual, when I (or anyone else) sees a new language construct, you wonder--when would I use that? The blog post is right th

Huh, never seen that before. And as usual, when I (or anyone else) sees a new language construct, you wonder--when would I use that? The blog post is right though. I imagine if you needed default values that were more dynamic, you can move that code into the method with R's function-call semantics. Therefore, you'd need to do less preparation of dynamic default values outside of the method, thus making libraries and APIs easier to use.