Determines if a file name refers to a directory
Supported Platforms: Windows and Mac OS
(vl-file-directory-p filename)
Type: String
File name. If you do not specify a full path name, vl-file-directory-p searches only the AutoCAD default drawing directory.
Type: T or nil
T, if filename is the name of a directory; nil if it is not.
(vl-file-directory-p "sample") T (vl-file-directory-p "yinyang") nil (vl-file-directory-p "c:/My Documents") T (vl-file-directory-p "c:/My Documents/lisp/yinyang.lsp") nil
(vl-file-directory-p "support") T (vl-file-directory-p "xyz") nil (vl-file-directory-p "/documents") T (vl-file-directory-p "/documents/output.txt") nil