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Chronic is a pure Ruby natural language date parser.
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Chronic http://chronic.rubyforge.org/ by Tom Preston-Werner == DESCRIPTION: Chronic is a natural language date/time parser written in pure Ruby. See below for the wide variety of formats Chronic will parse. == INSTALLATION: Chronic can be installed via RubyGems: $ sudo gem install chronic == CODE: Browse the code and get an RSS feed of the commit log at: http://github.com/mojombo/chronic.git You can grab the code (and help with development) via git: $ git clone git://github.com/mojombo/chronic.git == USAGE: You can parse strings containing a natural language date using the Chronic.parse method. require 'rubygems' require 'chronic' Time.now #=> Sun Aug 27 23:18:25 PDT 2006 #--- Chronic.parse('tomorrow') #=> Mon Aug 28 12:00:00 PDT 2006 Chronic.parse('monday', :context => :past) #=> Mon Aug 21 12:00:00 PDT 2006 Chronic.parse('this tuesday 5:00') #=> Tue Aug 29 17:00:00 PDT 2006 Chronic.parse('this tuesday 5:00', :ambiguous_time_range => :none) #=> Tue Aug 29 05:00:00 PDT 2006 Chronic.parse('may 27th', :now => Time.local(2000, 1, 1)) #=> Sat May 27 12:00:00 PDT 2000 Chronic.parse('may 27th', :guess => false) #=> Sun May 27 00:00:00 PDT 2007..Mon May 28 00:00:00 PDT 2007 See Chronic.parse for detailed usage instructions. == EXAMPLES: Chronic can parse a huge variety of date and time formats. Following is a small sample of strings that will be properly parsed. Parsing is case insensitive and will handle common abbreviations and misspellings. Simple thursday november summer friday 13:00 mon 2:35 4pm 6 in the morning friday 1pm sat 7 in the evening yesterday today tomorrow this tuesday next month last winter this morning last night this second yesterday at 4:00 last friday at 20:00 last week tuesday tomorrow at 6:45pm afternoon yesterday thursday last week Complex 3 years ago 5 months before now 7 hours ago 7 days from now 1 week hence in 3 hours 1 year ago tomorrow 3 months ago saturday at 5:00 pm 7 hours before tomorrow at noon 3rd wednesday in november 3rd month next year 3rd thursday this september 4th day last week Specific Dates January 5 dec 25 may 27th October 2006 oct 06 jan 3 2010 february 14, 2004 3 jan 2000 17 april 85 5/27/1979 27/5/1979 05/06 1979-05-27 Friday 5 4:00 17:00 0800 Specific Times (many of the above with an added time) January 5 at 7pm 1979-05-27 05:00:00 etc == LIMITATIONS: Chronic uses Ruby's built in Time class for all time storage and computation. Because of this, only times that the Time class can handle will be properly parsed. Parsing for times outside of this range will simply return nil. Support for a wider range of times is planned for a future release. Time zones other than the local one are not currently supported. Support for other time zones is planned for a future release. == LICENSE: (The MIT License) Copyright (c) 2008 Tom Preston-Werner Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.