is_dir

`is_dir`

is_dir — determines if a file is a directory.

is_dir (path)

path: A character string defining a relative or absolute file path in this file system.

t if the named file exists and is a directory, otherwise nil.

This function checks if a file is a directory. Relative file paths are relative to the current working directory.

Gamma> is_dir("/home/robert/w/devel/lisp");
t
Gamma> is_dir("../../doc");
t
Gamma> is_dir("doc");
nil
Gamma>

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