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gsamokovarov/stringio-truncate.rb

Created July 2, 2013 13:33
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stringio-truncate.rb
# If you truncate a StrinIO and don't rewind it, the next write will have
# leading zeroes.
require 'stringio'
s = StringIO.new
s.write 'foo'
p s.string # => "foo"
s.truncate 0
# s.rewind
s.write 'bar'
p s.string # => "\u0000\u0000\u0000bar"
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