A few months ago i discovered rosettacode.org, a website where various programming tasks are implemented in many different languages.
rosettacode is not only useful to compare languages, but also to learn new ones. You can see how a problem solved in a language that you know, looks like in the language you are learning. Or you can try to implement it in that new language, using the existing implementations as a reference.
For me to learn a new language, i need to be able to do something useful with it. Simply taking a book and doing exercises that are thrown away is not very motivational.
But doing the same kind of exercises on rosettacode is quite different, because the result is useful to those who want to use the solution for comparisons.
Solving tasks on rosettacode of course only works with tasks that are not already solved in your target language. But that is not usually a problem because no single language on rosettacode has all tasks solved. And there are new tasks every week.
For pike there are still a few hundreds of tasks unsolved, ranging from trivial to very hard. So there is something for every level. And don't fear of making a mistake. Your solutions will be reviewed by others, and corrected or discussed if necessary.
If solving existing tasks does not satisfy you, you can also make up new tasks.
Writing tasks can be fun and challenging. But again, no fear. Others will add appropriate questions and point out where your task is unclear or could be improved. That alone is a great learning experience. Then providing your implementation and comparing it with the solutions others come up with is educational. Some people may come up with an approach that you have not thought of, giving you further insight into the problem, and may even cause you to adapt your own solution.
In summary, whether you are completely new to pike or an experienced developer, rosettacode is a place where you can improve your skills, contribute to others learning experience, and show off pikes unique features. I hope you will join me in increasing pikes presence on the site.