rCharDet
rCharDet is a character encoding detection library for ruby and the implementation is based on Mozilla Charset Detectors. This is a forked project in a effort to make it Ruby 1.9 compatible
Usage:
require 'rubygems'
require 'rchardet'
cd = CharDet.detect(some_data)
encoding = cd['encoding']
confidence = cd['confidence'] # 0.0 <= confidence <= 1.0
Project page:
http://rubyforge.org/projects/rchardet
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