Bonjour,
Just for fun, I tried running the current Rosetta code with the TinyScheme
interpreter. It has case-insensitive symbols, so it failed interestingly.
The solution is to change the variable names (because otherwise 'A' is the
same as 'a').
The Scheme FAQ (
Claude Marinier scripsit:
The Scheme FAQ (
http://community.schemewiki.org/?scheme-faq-language ) states that
this is defined in R5RS. Chicken is case-sensitive. Is this commonly
ignored?
Very commonly, but not universally so. Case-sensitivity is required in
R6RS and R7RS. See
On 12 March 2014 17:16, Alex Shinn alexsh...@gmail.com wrote:
Then change your cond-expand to:
(cond-expand
((or chicken gauche) ; compatibility
(use srfi-13))
(else ; R7RS
(import (scheme base) (scheme write
That works. Thanks!
I have updated the page on
On Tue, Mar 11, 2014 at 9:20 PM, Daniel Carrera dcarr...@gmail.com wrote:
On 11 March 2014 12:41, Alex Shinn alexsh...@gmail.com wrote:
Chibi has string-map in (chibi string).
But actually, if you're aiming for R7RS support then
string-map is in (scheme base). Just replace the
With the last suggestion from Alex, and a tip to use cond-expand from Kon,
I have settled on the following:
-
;
; Works with Chicken Scheme and Gauche.
;
(cond-expand (chicken (use srfi-13))
(gauche (use srfi-13)))
(define msg The quick brown fox jumps
On Tue, Mar 11, 2014 at 7:15 PM, Daniel Carrera dcarr...@gmail.com wrote:
With the last suggestion from Alex, and a tip to use cond-expand from Kon,
I have settled on the following:
-
;
; Works with Chicken Scheme and Gauche.
;
(cond-expand (chicken (use
On 11 March 2014 12:41, Alex Shinn alexsh...@gmail.com wrote:
Chibi has string-map in (chibi string).
But actually, if you're aiming for R7RS support then
string-map is in (scheme base). Just replace the
cond-expand with:
(import (scheme base))
Hmm... sadly, (import (scheme base)) fails
(Sorry for off-topic of ML)
From: Daniel Carrera dcarr...@gmail.com
Subject: Re: [Chicken-users] Review my Caesar Cipher?
Date: Tue, 11 Mar 2014 13:20:15 +0100
Hmm... sadly, (import (scheme base)) fails with Chicken and Gauche.
Development head of Gauche already supports r7rs, FYI.
--shiro
Shiro Kawai scripsit:
Development head of Gauche already supports r7rs, FYI.
Excellent news!
--
John Cowan co...@ccil.orghttp://ccil.org/~cowan
No man is an island, entire of itself; every man is a piece of the
continent, a part of the main. If a clod be washed away by the sea,
Europe
Hello,
I found a Scheme implementation of the Caesar cipher on Rosetta Code. It
said This was written by a novice, please review... So I reviewed it, and
basically rewrote it.
I think my version is much better (clearer) but since I too am a novice, I
feel bad removing the novice warning. Could
I would use an auxiliary function char-plus to add or subtract an offset to
a character:
(define (caesar str n)
(define (char-plus c)
(let ((alpha ABCDEFGHIJKLMNOPQRSTUVWXYZ))
(if (not (char-alphabetic? c)) c
(let ((i (- (char-integer (char-upcase c)) 65)))
On Mon, Mar 10, 2014 at 10:26:56AM -0500, Phil Bewig wrote:
I would use an auxiliary function char-plus to add or subtract an offset to
a character:
(define (caesar str n)
(define (char-plus c)
(let ((alpha ABCDEFGHIJKLMNOPQRSTUVWXYZ))
(if (not (char-alphabetic? c)) c
Am 10.03.2014 15:51, schrieb Daniel Carrera:
Hello,
I found a Scheme implementation of the Caesar cipher on Rosetta Code.
It said This was written by a novice, please review... So I reviewed
it, and basically rewrote it.
I think my version is much better (clearer)
I tend to agree that
I used only the procedures provided by RnRS, instead of loading SRFI-13,
but you could use string-map if you want to. For those who prefer to roll
their own, here is a simple version of string-map! that mutates the string
in place:
(define (string-map! f str)
(do ((i 0 (+ i 1))) ((= i
Thanks. I think it's fair to use SRF-13. Now that I learned some character
functions from Phil, I think the following is nice and compact:
(define (caesar char)
(if (not (char-alphabetic? char)) char ; Return other chars verbatim.
(let ((i (- (char-integer (char-upcase char)) 65)))
Daniel Carrera scripsit:
(define (caesar char)
(if (not (char-alphabetic? char)) char ; Return other chars verbatim.
(let ((i (- (char-integer (char-upcase char)) 65)))
(integer-char (+ 65 (modulo (+ i key) 26))
(print (string-map caesar msg))
This isn't i18n-safe,
On 10 March 2014 17:10, John Cowan co...@mercury.ccil.org wrote:
This isn't i18n-safe, because char-alphabetic? can return #t on
non-Latin letters. Convert to an integer first and make sure it's in
the safe range. Then add a comment to the effect that this assumes a
Scheme in which
On 10 March 2014 20:04, Daniel Carrera dcarr...@gmail.com wrote:
I am trying to write an R7RS-compliant version. R7RS would give me
import, as well as char-integer and integer-char. The problem I'm
having is that my code does not work when I compile it, or when I use csi
-s, but it works
On Tue, Mar 11, 2014 at 6:16 AM, Daniel Carrera dcarr...@gmail.com wrote:
On 10 March 2014 20:04, Daniel Carrera dcarr...@gmail.com wrote:
I am trying to write an R7RS-compliant version. R7RS would give me
import, as well as char-integer and integer-char. The problem I'm
having is that my
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