kata

Are there any kata for practice VIM?

I've used VIM for many years as my primary text editor. And I am still learning how to use VIM for various editing tasks. The problem is that even if I learn something and use it once a week I forgot soon how I did it -- classic case is search and replace in many buffers using bufdo :(. I was wondering if there is any kata to daily VIM...

Good source for code katas

Possible Duplicate: What are some interesting coding exercises? I am searching for a good site for code katas. Preferably something where it is possible to upload solutions and rate them - so that I can also learn from other people's code. Anyone knows one? ...