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
26 # Generate a random number such as i<=n<max
31 module_function :random
34 return if array.size < 2
35 for i in 0...(array.size-1)
36 r = random(i, array.size)
42 module_function :shuffle
44 # See if the file is writable. The file will be created if it does not exist
46 # Return true if the file is writable, otherwise false.
48 def is_writable_file?(file)
50 file = Pathname.new file
54 return file.writable_real?
61 file.open("w") {|fh| }
69 module_function :is_writable_file?
71 # Convert a DateTime insntace to a Time instance.
74 return Time.mktime dt.year, dt.month, dt.day, dt.hour, dt.min, dt.sec
76 module_function :datetime2time
78 # Convert a Time instance to a DateTime instance
80 def time2datetime(time)
81 return DateTime.new(time.year, time.mon, time.mday,
82 time.hour, time.min, time.sec)
84 module_function :time2datetime
86 # Parse string representing a day-of-week and return a coresponding
87 # integer value: 1 (Monday) - 7 (Sunday)
90 index = Date::DAYNAMES.index(str) || Date::ABBR_DAYNAMES.index(str)
91 return nil if index.nil?
92 return index == 0 ? 7 : index
94 module_function :parse_dow