here is a patch that implements some ducks from the first video with the strategy pattern and draws them with skia. also made a pull request (edit: now merged): VL.HeadFirstDesignPatterns/01_StrategyPattern at master · sebescudie/VL.HeadFirstDesignPatterns · GitHub
there is a Root and DuckManager patch to actually make some different ducks and manage them:
the output looks a bit silly tho, but i didn’t want to clutter it with too much functionality:
