3 ## Copyright (C) 2004 NABEYA Kenichi (aka nanami@2ch)
4 ## Copyright (C) 2007-2008 Daigo Moriwaki (daigo at debian dot org)
6 ## This program is free software; you can redistribute it and/or modify
7 ## it under the terms of the GNU General Public License as published by
8 ## the Free Software Foundation; either version 2 of the License, or
9 ## (at your option) any later version.
11 ## This program is distributed in the hope that it will be useful,
12 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ## GNU General Public License for more details.
16 ## You should have received a copy of the GNU General Public License
17 ## along with this program; if not, write to the Free Software
18 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 # Generate a random number such as i<=n<max
30 module_function :random
33 return if array.size < 2
34 for i in 0...(array.size-1)
35 r = random(i, array.size)
41 module_function :shuffle
43 # See if the file is writable. The file will be created if it does not exist
45 # Return true if the file is writable, otherwise false.
47 def is_writable_file?(file)
49 file = Pathname.new file
53 return file.writable_real?
60 file.open("w") {|fh| }
68 module_function :is_writable_file?