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class method
File.directory?
File.directory?(file_name) → true or false
file.c
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VALUE
rb_file_directory_p(VALUE obj, VALUE fname)
{
#ifndef S_ISDIR
# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif
struct stat st;
if (rb_stat(fname, &st) < 0) return Qfalse;
if (S_ISDIR(st.st_mode)) return Qtrue;
return Qfalse;
}
Returns true if the named file is a directory, or a symlink that points at a directory, and false otherwise.
file_name can be an IO object.
Example
File.directory?(".")