Why doesn't Ruby have a real StringBuffer or StringIO?

Question

I recently read a nice post on using StringIO in Ruby. What the author doesn\'t mention, though, is that StringIO is just an \"I.\" There\'s no \

Answer 1

Like other IO-type objects in Ruby, when you write to an IO, the character pointer advances.

>> s = StringIO.new
=> #
>> s << 'foo'
=> #
>> s << 'bar'
=> #
>> s.pos
=> 6
>> s.rewind
=> 0
>> s.read
=> "foobar"