Trying to learn lisp (and I guess emacs along with it).
I was wondering how you would go about clearing the output and replacing it.
Could be in a LISP repl, or an emacs buffer.
Something akin to the following in python.
def go(r):
for i in range(r):
sys.stdout.write("\rDoing %i" % i)
sys.stdout.flush()
For common lisp, you are looking for
Functions FINISH-OUTPUT, FORCE-OUTPUT, CLEAR-OUTPUT:
finish-output, force-output, and clear-output exercise control over the internal handling of buffered stream output.
finish-output attempts to ensure that any buffered output sent to output-stream has reached its destination, and then returns.
force-output initiates the emptying of any internal buffers but does not wait for completion or acknowledgment to return.
clear-output attempts to abort any outstanding output operation in progress in order to allow as little output as possible to continue to the destination.
and
The value of *debug-io*, called debug I/O, is a stream to be used for interactive debugging purposes.
The value of *error-output*, called error output, is a stream to which warnings and non-interactive error messages should be sent.
The value of *query-io*, called query I/O, is a bidirectional stream to be used when asking questions of the user. The question should be output to this stream, and the answer read from it.
The value of *standard-input*, called standard input, is a stream that is used by many operators as a default source of input when no specific input stream is explicitly supplied.
The value of *standard-output*, called standard output, is a stream that is used by many operators as a default destination for output when no specific output stream is explicitly supplied.
The value of *trace-output*, called trace output, is the stream on which traced functions (see trace) and the time macro print their output.
Emacs Lisp is quite different, you might want to start here: https://www.gnu.org/software/emacs/manual/html_node/elisp/Output-Functions.html
