You can do this in Rust with a mut pointer into the string. You can even do it in Go with a byte buffer. Lots of languages give you the tools to do stuff like t

You can do this in Rust with a mut pointer into the string. You can even do it in Go with a byte buffer. Lots of languages give you the tools to do stuff like this if you look. I hear Python's StringIO does similar things but I'm not as familiar with Pythons runtime in these situations.