On Mon, Jun 24, 2019 at 5:19 PM Shu-Hung You <
shu-hung@eecs.northwestern.edu> wrote:
>
>
> FWIW, (write "foo") writes "\"foo\"" to the file. Maybe you want
> write-string or write-bytes?
>
*facepalm*
I think I want a better brain. Thank you.
Matthew, thanks for the clarification about ap
On Mon, Jun 24, 2019 at 4:09 PM David Storrs wrote:
>
> I actually did try writing something at the extended position, although I
> removed it before posting the above. Even with a write, it still does not do
> as expected. In fact, the results are even stranger:
>
> #lang racket
>
> (define (
I think that part is because you've opened the file in 'append mode.
At the OS level, 'append means "move to the end of the file before each
write". So, 'append and `file-position` to extend a file size just
don't work helpfully together.
I'll improve the docs.
At Mon, 24 Jun 2019 17:09:05 -0400
=
Call for Participation
ICFP 2019
24th ACM SIGPLAN International Conference on Functional Programming
and affiliated events
August 18 - August 23, 2019
Berlin, Germany
http://icfp19.sigplan.org/
Early Registration until July 1
I actually did try writing something at the extended position, although I
removed it before posting the above. Even with a write, it still does not
do as expected. In fact, the results are even stranger:
#lang racket
(define (say . args) (displayln (apply ~a args)))
(define the-path "./test-fil
On Mon, Jun 24, 2019 at 4:51 PM Jon Zeppieri wrote:
>
> `lseek` docs say:
>
> > The lseek() function shall allow the file offset to be set beyond the end
> > of the existing data in the file. If data is later written at this point,
> > subsequent reads of data in the gap shall return bytes with
I *think* that the docs are wrong here. `file-position` maps onto
`lseek` on posix systems (pretty sure about this after a quick perusal
of the code) and `lseek` docs say:
> The lseek() function shall allow the file offset to be set beyond the end of
> the existing data in the file. If data is la
Consider the following test script:
#lang racket
(define (say . args) (displayln (apply ~a args)))
(define the-path "./test-file")
(when (file-exists? the-path) (delete-file the-path))
(say "before open, file exists?: " (file-exists? the-path))
(let ([the-port (open-output-file the-path #:mode
Wow, this is a great blog! Many Thanks!
On Monday, June 24, 2019 at 2:52:35 AM UTC+2, Alex Harsanyi wrote:
>
> Have a look at the `snip%` and `pasteboard%` classes: you can represent
> each glyph using a `snip%` and the pasteboard will handle the moving it
> with the mouse. You can derive the `
9 matches
Mail list logo
