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/gist:fa450f7bc4e43ecefe30

Created September 16, 2014 01:16
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gistfile1.txt
[1] pry(main)> a = String.new
=> ""
[2] pry(main)> a.encoding
=> #<Encoding:ASCII-8BIT>
[3] pry(main)> a << "\xaa\xbb"
=> "\xAA\xBB"
[4] pry(main)> a.encoding
=> #<Encoding:UTF-8>
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