Ruby-Stemmer¶ ↑

Ruby-Stemmer exposes SnowBall API to Ruby.

This package includes libstemmer_c library released under BSD licence and available for free at: snowball.tartarus.org/dist/libstemmer_c.tgz.

For more details about libstemmer_c please visit snowball.tartarus.org.

require 'rubygems'
require 'lingua/stemmer'

stemmer= Lingua::Stemmer.new(:language => "ro")
stemmer.stem("netăgăduit") #=> netăgădu

require 'rubygems'
require 'lingua/stemmer'

Lingua.stemmer( %w(incontestabil neîndoielnic), :language => "ro" ) #=> ["incontest", "neîndoieln"]
Lingua.stemmer("installation") #=> "instal"
Lingua.stemmer("installation", :language => "fr", :encoding => "ISO_8859_1") do | word |
  puts "~> #{word}" #=> "instal"
end # => #<Lingua::Stemmer:0x102501e48>

# in config/environment.rb:
config.gem 'ruby-stemmer', :version => '>=0.6.2', :lib => 'lingua/stemmer'

• RDoc: ruby-stemmer.rubyforge.org/ruby-stemmer

• Test: github.com/aurelian/ruby-stemmer/blob/master/test/lingua/test_stemmer.rb

gem install ruby-stemmer

Please not that Windows is not supported at this time.

$ git clone git://github.com/aurelian/ruby-stemmer.git
$ cd ruby-stemmer
$ rake -T #<== see what we've got
$ rake ext #<== builds the extension do'h
$ rake test

The stemming process is an algorithm to allow one to find the stem of an word (not the root of it). For further reference on stem vs. root, please check wikipedia articles on the topic:

• en.wikipedia.org/wiki/Stem_%28linguistics%29

• en.wikipedia.org/wiki/Root_%28linguistics%29

• Open issues: github.com/aurelian/ruby-stemmer/issues

• Windows Support -> see rake-compiler to cross-compile a dll (with the gem and nokogiri Rakefile).

• Fork the project from github: github.com/aurelian/ruby-stemmer

• Make your feature addition or bug fix: github.com/aurelian/ruby-stemmer/issues

• Add tests for it. This is important so I don’t break it in a future version unintentionally.

• Commit, do not mess with rakefile, version, or history.

  if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull

• Send me a pull request. Bonus points for topic branches.

• stemmer4r: rubyforge.org/projects/stemmer4r (ext)

• fast-stemmer: github.com/romanbsd/fast-stemmer (ext)

• stemmer: rubyforge.org/projects/stemmer (pure ruby)

• uea-stemmer: github.com/ealdent/uea-stemmer

• add yours

Copyright © 2009 Aurelian Oancea. See MIT-LICENSE for details.

• Aurelian Oancea

• Yury Korolev

• planet33.ru is using Ruby-Stemmer together with Classifier (github.com/yury/classifier) to automatically rate places based on users comments