Constthe file name without the leading directories
Given a string aPath,and assuming it corresponds to a valid path
string, return the file size in bytes of the file.
the size of the file in bytes
Given a string aPath, returns a boolean telling if this string is
a directory or not.
if aPath is a directory
Given a string aPath, and assuming it corresponds to a valid
directory on the filesystem, return an array of strings
corresponding to the files in that directory.
an array of strings
Given a string
aPath, and assuming it corresponds to a valid path string, return the base name of the file associated to that string.