Hi,

In message "Re: [PATCH] File.readable_world? and File.writable_world?"
    on 04/01/11, Ian Macdonald <ian / caliban.org> writes:

|> I prefer world_writable? that means being writable from anybody.
|
|What about writable_others? I think that would be useful to have, too.

I think it would be source of confusion.  They are too similar.  How
about writable_world? returns its permission bits if the file is
writable from others, otherwise nil?

  mode   result
================
  777 => 777
  557 => 557
  755 => nil

							matz.