The extension of the last component of path, without the dot, and whether it has one.
path_extension :: (path: string) -> (extension: string, found_extension: bool)A dot at the start of the name does not start an extension, so .hidden has none. With several
dots the last one counts.
Parameters
- path: string
Returns
- extension: string
- found_extension: bool
ext, found := path_extension("dir/archive.tar.gz");
assert(found && ext == "gz");
_, hidden := path_extension("dir/.hidden");
assert(!hidden);