FlatMap list method

The flatMap (or flat_map) method is used to transforms each element into a list and concatenates all resulting lists into a single flat list.

The method takes a single argument that is the function to transform the items to a list. The format is <list>.flatMap($<name> <action_with_$name>).

For example:

findit -w 'files.flatMap($file $file.files).map($file $file.name).contains("build.gradle")'

will show the directories that have a file name build.gradle as a grandchild.