DistinctBy list method

Aliases: uniqueBy(), distinct_by(), unique_by()

The distinctBy method is used to remove duplicates from a list based on an argument.

The method takes a single argument that is the function to decides the file distinction. The format is <list>.distinctBy($<name> <action_with_$name>).

For example:

findit  -d 'file: `me` has `files.distinctBy($file $file.extension).length()` extensions in `files.length()` files' -w 'IS DIR'

will show all the directories with the number of files and extensions in each directory