path_extension_of(an_item)
Obtain a path extension of the item. The result does not starts with ".".
missing value will be returned, if the target item does not have a path extension.
Parameters
- an_item (a reference to file/folder) :
Almost types of references to a file or a folder can be accepted. e.g.) HFS path, POSIX path, alias, file specification, reference form of Finder and furl.
Result
text : A path extension