It's a fun idea! Why not just post with '[challenge]' in the object? People not interested in such threads can skip them easily.
I also propose '[D tricks]' as another meta-subject. For example, did you know you can have import statements in structs (maybe also in classes, I don't know)? That way, you can put an Importer struct in a template to give it access to std functions you need, even when the template is mixed in another scope. Philippe
