Returns an array of files/directories names which are immediate children of the directory
denoted by the absolute path of the receiver object.
The order in which the names are returned is dependent on the file system (not necessarily alphabetic order).
The special names "." and ".." are not returned.
The result is an array of strings.
If the receiver object is not a directory then the result is .nil.
Example 5.258. File class — list method
names=.File~new("c:\program files\oorexx\samples")~listsaynames~toString/* Possible output */apiccreply.rexcomplex.rexdrives.rexfactor.rex(etc...)