How to delete all contents of a folder with Ruby-Rails?

Ruby has the *nix rm -rf equivalent in the FileUtils module that you can use to delete both files and non-empty folders/directories:

FileUtils.rm_rf('dir/to/remove')

To keep the directory itself and only remove its contents:

FileUtils.rm_rf(Dir.glob('dir/to/remove/*'))

FileUtils.rm_rf(Dir['dir/to/remove/*'])      # shorter version of above