Marc Feeley <feeley@iro.umontreal.ca> writes:
On 24-Apr-08, at 10:47 AM, Joel J. Adamson wrote:
How the heck do I use read-line in a program?
[...]
and I always just end up redefining read-line:
(define (read-this) (let ((input (read-char)) (output "")) (if (char=? input #\newline) output (string-append (string input) (read-this))))) (read-this) "" (read-this)this is text, baby "this is text, baby"
I'm really not getting this; can someone please explain it to me?
I don't understand the problem you are having! Your read-this is behaving exactly like read-line !
Yeah, it's the same. I was saying my frustration --- and this is monumental because it's the only major frustration I've had in two years of working with Scheme --- was that all I could come up with was a re-implementation of read-line. The problem is really that I want read-line to behave exactly like (read) except for the form in which it accepts the input: wait for input and accept that input as a string. I could have the user input a line in double-quotes and just use (read), but I would prefer the user not to type the quote marks. Am I being too picky...? The other problem with using a recursive reading-by-token procedure is that the user then has to use ^D to end the line (I've reserved ^D to exit the program). Joel -- Joel J. Adamson Biostatistician Pediatric Psychopharmacology Research Unit Massachusetts General Hospital Boston, MA 02114 (617) 643-1432 (303) 880-3109 Public key: http://pgp.mit.edu http://www.unc.edu/~adamsonj The information transmitted in this electronic communication is intended only for the person or entity to whom it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this information in error, please contact the Compliance HelpLine at 800-856-1983 and properly dispose of this information.