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Doodle is a Ruby library and gem for simplifying the definition of Ruby classes by making attributes and their properties more declarative
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= doodle * Homepage: http:https://doodle.rubyforge.org * Github repo: http:https://github.com/seanohalpin/doodle/tree/master * Lighthouse issue tracker: http:https://seanohalpin.lighthouseapp.com/projects/26673-doodle/overview == DESCRIPTION: Doodle is a Ruby library for simplifying the definition of Ruby classes by making attributes and their properties more declarative. Doodle is eco-friendly: it does not globally modify Object, Class or Module, nor does it pollute instances with its own instance variables (i.e. it plays nice with yaml). Doodle has been tested with Ruby 1.8.6, 1.9.1 and JRuby 1.1. It has not yet been tested with Rubinius. Please feel free to post bug reports, feature requests, and any comments or discussion topics to the doodle Google group: http:https://groups.google.com/group/ruby-doodle == FEATURES: * initialization * using positional arguments * with named arguments * by block * defaults * initial values * validation at attribute and class levels * conversions for attributes and classes * collectors to help in defining simple DSLs * works for classes, instances and singletons == SYNOPSIS: === Example 1 require 'rubygems' require 'date' require 'doodle' class DateRange < Doodle has :start_date do default { Date.today } end has :end_date do default { start_date } end end dr = DateRange.new dr.start_date # => #<Date: 4909159/2,0,2299161> dr.end_date # => #<Date: 4909159/2,0,2299161> === Example 2 require 'rubygems' require 'date' require 'doodle' require 'doodle/utils' # for try class DateRange < Doodle has :start_date, :kind => Date do default { Date.today } from String do |s| Date.parse(s) end must "be >= 2000-01-01" do |d| d >= Date.parse('2000-01-01') end end has :end_date do default { start_date } from String do |s| Date.parse(s) end end must 'have end_date >= start_date' do end_date >= start_date end from String do |s| m = /(\d{4}-\d{2}-\d{2})\s*(?:to|-|\s)\s*(\d{4}-\d{2}-\d{2})/.match(s) if m self.new(*m.captures) else raise Exception, "Cannot parse date: '#{s}'" end end end dr = DateRange.new '2007-12-31', '2008-01-01' dr.start_date # => #<Date: 4908931/2,0,2299161> dr.end_date # => #<Date: 4908933/2,0,2299161> dr = DateRange '2007-12-31', '2008-01-01' dr.start_date # => #<Date: 4908931/2,0,2299161> dr.end_date # => #<Date: 4908933/2,0,2299161> dr = DateRange :start_date => '2007-12-31', :end_date => '2008-01-01' dr.start_date # => #<Date: 4908931/2,0,2299161> dr.end_date # => #<Date: 4908933/2,0,2299161> dr = DateRange do start_date '2007-12-31' end_date '2008-01-01' end dr.start_date # => #<Date: 4908931/2,0,2299161> dr.end_date # => #<Date: 4908933/2,0,2299161> dr = DateRange.from '2007-01-01 to 2008-12-31' dr.start_date # => #<Date: 4908203/2,0,2299161> dr.end_date # => #<Date: 4909663/2,0,2299161> dr = DateRange.from '2007-01-01 2007-12-31' dr.start_date # => #<Date: 4908203/2,0,2299161> dr.end_date # => #<Date: 4908931/2,0,2299161> p try { dr = DateRange.from 'Hello World' dr.start_date # => dr.end_date # => } p try { dr = DateRange '2008-01-01', '2007-12-31' dr.start_date # => dr.end_date # => } # >> #<Doodle::ConversionError: Cannot parse date: 'Hello World'> # >> #<Doodle::ValidationError: DateRange must have end_date >= start_date> == INSTALL: * Linux/Mac OS X $ sudo gem install doodle * Windows C:\> gem install doodle == LICENSE: (The MIT License) Copyright (c) 2007-2009 Sean O'Halpin 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.
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Doodle is a Ruby library and gem for simplifying the definition of Ruby classes by making attributes and their properties more declarative
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