>>10
It is the `escape-to-scheme' case of the process forms, it behaves like `begin' but is run in a fork. For example:
(run (pipe
(begin
(display "Hello SchemeBBS!")
(newline)
(display "How are you doing?")
(newline))
(wc -l)))This will output 2.
It is a somewhat common mistake in bash to try to modify the environment of the parent shell from a child shell in a pipeline. Here it is in scsh:
(let ((maximum 0))
(run (pipe
(seq 100)
(begin
(let loop ((l (read-line)))
(when (not (eof-object? l))
(when (> (string->number l) maximum)
(set! maximum (string->number l)))
(display l)
(newline)
(loop (read-line)))))
(wc -l)))
(display (list 'maximum maximum)))