Text Profile Signature calculates a fuzzy hash of textual fields for Deduplication. It's the port of TextProfileSignature which is written in Java.

Add this to the Gemfile:

gem 'text_profile_signature'

or install it directly:

gem install text_profile_signature

Add the following in the Gemfile:

gem 'text_profile_signature', :git => 'https://github.com/iCEAGE/text_profile_signature.git'

Please follow the installation procedure and then run the following code:

# Load the gem
require 'text_profile_signature'

opts = {
  :min_token_length => 2, # Default to 2
  :quant_rate => 0.01 # Default to 0.01
}

text_profile_signature_instance = TextProfileSignature.new(opts)

text = <<-STR
Liberty, in philosophy, involves free will as contrasted with determinism.[1] In politics, liberty consists of the social and political freedoms enjoyed by all citizens.[2] In theology, liberty is freedom from the bondage of sin.[3] Generally, liberty seems to be distinct from freedom in that freedom concerns itself primarily, if not exclusively, with the ability to do as one wills and what one has the power to do; whereas liberty also takes into account the rights of all involved. As such, liberty can be thought of as freedom limited by rights, and therefore cannot be abused.
STR

sign = text_profile_signature_instance.generate_sign(text)

puts sign

Copyright (C) 2016 Hamed Ramezanian Nik

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this program. If not, see http://www.gnu.org/licenses/.