End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

class method

Dir.exist?

Dir.exist?(file_name) → true or false

VALUE
rb_file_directory_p(void)
{
}

Returns true if the named file is a directory, false otherwise.

See also .entries .foreach .empty? .getwd also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0