sortable¶ ↑

• github.com/bscofield/sortable

Sortable provides a DSL for defining sort order on any Ruby object

To use it, you just call the sortable method and pass it a list of methods and/or blocks; when you call sort on a collection of these objects, each method/block is evaluated in turn, and the first that provides a non-zero sort value is used.

require 'sortable'

class Book
  include Sortable

  attr_accessor :author, :title

  sortable :author, lambda {|book| book.title.sub(/^(The|A|An) /, '')}

  def initialize(author, title)
    self.author = author
    self.title  = title
  end
end

fforde  = Book.new('Fforde', 'Something Rotten')
stroud1 = Book.new('Stroud', 'The Golem\'s Eye')
stroud2 = Book.new('Stroud', 'The Amulet of Samarkand')
colfer  = Book.new('Colfer', 'Artemis Fowl')

[fforde, stroud1, stroud2, colfer].sort #=> colfer, fforde, stroud2, stroud1

Installation is available with a simple:

sudo gem install sortable

(The MIT License)

Copyright © 2009 Ben Scofield

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.