Re: [racket-users] Re: read-from-string(-all)
aha, here it is! The closest form is then `(call-with-input-string str (λ(in)(port->list read in)))'. Thanks Sam and Alex! On Wed, Feb 6, 2019 at 10:01 PM Sam Tobin-Hochstadt wrote: > Also, almost that `read-all` function is provided as `port->list` from > `racket/port`. > > Sam > > On Wed, Feb 6, 2019 at 6:25 AM Alex Harsanyi > wrote: > > > > (read-from-string "123") is equivalent to `(call-with-input-string "123" > read)` while read-from-string-all can be replaced by: > > > > (define (read-all in) > > (let loop ([result '()]) > > (let ((v (read in))) > > (if (eof-object? v) > > (reverse result) > > (loop (cons v result)) > > > > > (call-with-input-string "123 456" read-all) > > '(123 456) > > > > although I am not sure it is a good idea to call read on strings > received from the user... > > > > Alex. > > On Wednesday, February 6, 2019 at 6:49:57 PM UTC+8, Laurent Orseau wrote: > >> > >> read-from-string and read-from-string-all are convenient functions, but > they belong to the mzlib/string library, which is deprecated. I can't find > an existing replacement in racket/string or racket/base. Is there one with > a different name? > > > > -- > > You received this message because you are subscribed to the Google > Groups "Racket Users" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to racket-users+unsubscr...@googlegroups.com. > > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [racket-users] Re: read-from-string(-all)
Also, almost that `read-all` function is provided as `port->list` from `racket/port`. Sam On Wed, Feb 6, 2019 at 6:25 AM Alex Harsanyi wrote: > > (read-from-string "123") is equivalent to `(call-with-input-string "123" > read)` while read-from-string-all can be replaced by: > > (define (read-all in) > (let loop ([result '()]) > (let ((v (read in))) > (if (eof-object? v) > (reverse result) > (loop (cons v result)) > > > (call-with-input-string "123 456" read-all) > '(123 456) > > although I am not sure it is a good idea to call read on strings received > from the user... > > Alex. > On Wednesday, February 6, 2019 at 6:49:57 PM UTC+8, Laurent Orseau wrote: >> >> read-from-string and read-from-string-all are convenient functions, but they >> belong to the mzlib/string library, which is deprecated. I can't find an >> existing replacement in racket/string or racket/base. Is there one with a >> different name? > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [racket-users] Re: read-from-string(-all)
On Wednesday, February 6, 2019 at 7:58:47 PM UTC+8, Laurent Orseau wrote: > > Oh nice, I didn't know we could do that one! > Point taken :) > > I suppose (hope?) you can still use sandboxing with memory limits for this? > You could make your own read table which disables all special treatment of chars, and parameterize it on every read invocation, but the code will not look elegant -- in my opinion anyway. If I had read a list of strings, I would just use: (map string->number (string-split "123 345")) and maybe check for #f in the resulting list. To read other things the code will be more complex... Alex. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [racket-users] Re: read-from-string(-all)
Oh nice, I didn't know we could do that one! Point taken :) I suppose (hope?) you can still use sandboxing with memory limits for this? On Wed, Feb 6, 2019 at 11:52 AM Alex Harsanyi wrote: > > > On Wednesday, February 6, 2019 at 7:36:40 PM UTC+8, Laurent Orseau wrote: >> >> On Wed, Feb 6, 2019 at 11:25 AM Alex Harsanyi >> wrote: >> >> although I am not sure it is a good idea to call read on strings received >>> from the user... >>> >> >> They're not eval'ed, >> >> > Try: (call-with-input-string "#100[]" read) > > Alex. > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [racket-users] Re: read-from-string(-all)
On Wednesday, February 6, 2019 at 7:36:40 PM UTC+8, Laurent Orseau wrote: > > On Wed, Feb 6, 2019 at 11:25 AM Alex Harsanyi > wrote: > > although I am not sure it is a good idea to call read on strings received >> from the user... >> > > They're not eval'ed, > > Try: (call-with-input-string "#100[]" read) Alex. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [racket-users] Re: read-from-string(-all)
On Wed, Feb 6, 2019 at 11:25 AM Alex Harsanyi wrote: > (read-from-string "123") is equivalent to `(call-with-input-string "123" > read)` while read-from-string-all can be replaced by: > > (define (read-all in) > (let loop ([result '()]) > (let ((v (read in))) > (if (eof-object? v) > (reverse result) > (loop (cons v result)) > > > (call-with-input-string "123 456" read-all) > '(123 456) > Thanks Alex. I just wanted to make sure I wasn't overlooking something before writing my own version. (and I'm particularly interested in the -all variant.) > although I am not sure it is a good idea to call read on strings received > from the user... > They're not eval'ed, it's only data (for plotting, etc.). And the user is me, using text copied from the output of some program (after some grep/sed-ing). -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[racket-users] Re: read-from-string(-all)
(read-from-string "123") is equivalent to `(call-with-input-string "123" read)` while read-from-string-all can be replaced by: (define (read-all in) (let loop ([result '()]) (let ((v (read in))) (if (eof-object? v) (reverse result) (loop (cons v result)) > (call-with-input-string "123 456" read-all) '(123 456) although I am not sure it is a good idea to call read on strings received from the user... Alex. On Wednesday, February 6, 2019 at 6:49:57 PM UTC+8, Laurent Orseau wrote: > > read-from-string and read-from-string-all are convenient functions, but > they belong to the mzlib/string library, which is deprecated. I can't find > an existing replacement in racket/string or racket/base. Is there one with > a different name? > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
