From: Brian Candler <B.Candler@...>
Date: 2007-06-01T20:15:54+09:00
Subject: Getting the last N bytes of a string:

What's the simplest way to get only the last 10 bytes of a string?

    buf[-10,10]

doesn't work if buf is smaller than 10 bytes, as it returns nil. Is there
anything simpler than

    buf[-10,10] || buf

?

Thanks,

Brian.

P.S. To get the *first* 10 bytes of a string is easy: buf[0,10] always
works, whether or not buf is smaller than 10 bytes)