For example,

(vector-sort (vector 1 2 10))

returns

#(1 10 2)

when it should return

#(1 2 10)

This is likely due to using the native Javascript Array.prototype.sort function which does lexicographical sorting.

In BiwaScheme 0.5.4.2 used here there are defined procedures | & >> << but they are undefined in demo on http://www.biwascheme.org/
where they removed from biwascheme?

Hello,

Interactive examples hosted on biwascheme.org under the "Demo" section are currently down, with quite a few 404.

Thank you for your work on BiwaScheme.

The biwascheme library code uses with in several places, generally in conjunction with define_libfunc. Given the concerns involved in use of with (the ambiguity problem came up for me earlier why trying to hack on the js interface...), I'd think that, in the long term, it could be useful to refactor the withs out.

(Tangentially, I'd also super-appreciate it if a future biwascheme would conform to ES5 strict mode, but that isn't necessarily feasible.)

• fix raphaelis demo is broken
• update History.txt
• Add size cap to stack trace (#9) Confirmed it grows too long with infinite loop.
• release .js (update website)
• release node package

Hello,

Scheme (and programming) novice here, so please forgive any obvious mistake.
I tried the following code in BiwaScheme's REPL:

(define say-hello
(lambda ()
(alert "Hi there!")))

(add-handler! (getelem "body") "click" say-hello)
(remove-handler! (getelem "body") "click" say-hello)

Upon clicking the page, an alert shows nonetheless. Am I missing something?

Thank you.

Using BiwaScheme 0.6.3.dev
When I run

((lambda (a . b) 0))

I get

[BUG] unknown opecode type: undefined []

which I guess means the compiler's generating invalid bytecode?

The length of the list for which this function returns #f seems to vary as I refresh the page. Sometimes it is 3, sometimes 4, sometimes 5. I'm using biwascheme through repl.it.

These functions should accept complex numbers.

finite? infinite? nan? abs sqrt expt

(See http://trac.sacrideo.us/wg/raw-attachment/wiki/WikiStart/r7rs.pdf p.32~ for their definitions)

Should inherit onError from parent interpreter here:

Is there a reason define-record-type doesn't follow the spec?
It should look like:

(define-record-type my-type
  (make-my-type bar baz)
  my-type?
  (bar get-bar set-bar!)
  (baz get-baz))

but instead, it's like:

(define-record-type my-type
  (fields (mutable bar) (immutable baz)))

I can't port Scheme code, and anyone who works with what I have in Biwascheme would have to figure out this syntax.

This is somewhat interesting, as I've never seen Chrome fail to defer focus to an active DOM element. Typing "(" into the interpreter works, but "d" triggers a scroll down hotkey in Chrome. It also consumes the character.

EDIT: This appears to be a conflict with the Vimium extension for Chrome. Disabling the extension allows the interpreter to work as it should. Possibly this is more of an issue with Vimium than BiwaScheme...

I am working on a project using Scheme in the browser. Biwa seems to check off all the other requirements except for proper r6 syntax support. I am therefore interested in getting the portable syntax implementation working on Biwa if possible.

Before I start, I am curious if anyone else has tried, would like to offer advice, or can provide guidance for eventually landing it as a patch to Biwa if I succeed.

Thanks!

values "Delivers all of its arguments to its continuation"

http://www.r6rs.org/final/html/r6rs/r6rs-Z-H-14.html#node_sec_11.15

Copy old tickets in yhara/biwascheme

When receive-jsonp is called with url like the following,

(receive-jsonp "http://example.jp?foo=1")

it will access invalid url "http://example.jp?foo=1?callback=BiwaScheme.jsonp_receiver[xx]" .

To fix this, receive-jsonp should accept an alist as second argument like http-post.

(receive-jsonp "http://example.jp" '(("foo" . 1)))

reported by @psihy (ja)

Hello,

element-append-child! and element-insert! are duplicates of the same function. Maybe you could deprecate one of the two?

Thanks.

On homepage:

Download
biwascheme-0.6.4.js
biwascheme-0.6.4-min.js

Both links are 404 Not Found

http://www.biwascheme.org/test/spec.html?rerun=11.6%20Procedure%20predicate

This error is shown in Chrome's development console. (confirmed both with 0.6.3 and git master)

{message: "Error: Invalid lambda: (lambda ()) []"}

1. open http://www.biwascheme.org/demo/repl.html
2. type asdf (or something)
3. push eval

Result:

Error: execute: unbound symbol: "asdf" []
Error: execute: unbound symbol: "asdf" []

Please give me a couple of code examples of how to deal with:

• complex numbers
• rational numbers
• infinity
• inexact numbers
• etc...

I just tried some examples with the new delay and force functions but they produce infinitiy loops in the browser. Here is my example:

(define stream-car car)

(define stream-cdr
  (lambda (stm)
    (force (cdr stm))))

(define-syntax stream-cons
  (syntax-rules ()
    ((_ head tail) (cons head (delay tail)))))

(define make-stream 
  (lambda (seed proc)
    (letrec 
      ((stream-builder
         (lambda (n)
           (stream-cons n (stream-builder (proc n))))))
      (stream-builder seed))))

(define stream-item
  (lambda (str k)
    (if (= k 0)
      (stream-car str)
      (stream-item (stream-cdr str) (- k 1)))))

(define stream-map
  (lambda (f str)
    (stream-cons
     (f (stream-car str))
     (stream-map f (stream-cdr str)))))

(define print-stream
  (lambda (stm n)
    (cond
      ((<= n 0) (display "...")(newline))
      (else
       (display (stream-car stm))
       (display ", ")
       (print-stream (stream-cdr stm) (- n 1))))))

(define nat_zahlen (make-stream 0 (lambda (n) (+ n 1))))
(print-stream nat_zahlen 11)

This example works on https://bluishcoder.co.nz/jsscheme/ and should produce:

(print-stream nat_zahlen 11)
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ...

test

• complex? should return #t for complex, real, rational, integer
• real? should return #t for real, rational, integer
• rational? should return #t for rational, integer

I'm new to Scheme, so I don't know it this is allowed by the Scheme spec, but the Racket implementation in both R5RS and PrettyBig mode reports an error when using more arguments than needed.
Is this is by design, or a bug?

(define (func x y) (* x y))
(func 2 3 4 5 6) ; This returns 6, despite using more arguments than required.

Tried this in repl.it (BiwaScheme version 0.5.7) and biwascheme.org (version 0.6.1).

On certain lists with repeated entries, the list? predicate disagrees with other Scheme implementations, e.g., DrRacket and http://tryscheme.sourceforge.net/. See the session from http://www.biwascheme.org/ below.

BiwaScheme Interpreter version 0.6.1
Copyright (C) 2007-2010 Yutaka HARA and the BiwaScheme team
biwascheme> (list? (list 1 1))
=> #f
biwascheme>

I've had some problems with jquery when trying biwascheme with other libraries loaded in the page. Is that perhaps because of the jquery and underscore in the biwascheme library? I'm wondering if that is conflicting with other libraries. Wouldn't it be better to put those in the node and bower package files and let the user of the library manage those dependencies?

Hi, I know this was marked fixed two years ago, but it seems to have recurred in the newest release.

Here's the code I'm using, and the error:

HTML:

<script src="biwascheme.js">
(load "./test.scm")
(myfunc)
</script>

test.scm:

(define (myfunc)
(element-insert! "body" "Test"))

And this is the error in the JavaScript console:
TypeError: txt.replace is not a function
on line biwascheme.js:11575

This is on Firefox 25.0.1, the problem does not happen in the Webkit-based dwb browser, however.

To stop this warning:

(node:15330) DeprecationWarning: util.print is deprecated. Use console.log instead.

The following code:

(map (lambda (x) x) (list 1 2 (vector 3 4)))

Should return:

(1 2 [3 4]) (leaving the vector alone)

But is instead returning:

(1 2 (3 4)) (converting the vector into a list)

This is actually a deep problem in the codebase, caused by my refactoring in August:
kenpratt@6367a19
kenpratt@6c43488

Basically, there used to be a function named build_list that did a deep conversion, and everything else was shallow, but in the process of refactoring I changed List(...) to be deep and this many parts of the codebase were switched to deep conversion that should have been shallow conversion.

I've gone through the code carefully to figure out what behaviour I changed from shallow list conversion to deep list conversion and fixed it. Patch is here:
kenpratt@99e28ca

I've changed it so that:

List(1, 2, [3]) == (list 1 2 (vector 3 4))
array_to_list(1, 2, [3]) == (list 1 2 (vector 3 4))
deep_array_to_list(1, 2, [3, 4]) == (list 1 2 (list 3 4))

So the only time you get a recursive conversion is when you ask for it with deep_array_to_list.

Current:
Scheme interpreter writtern in JavaScript http://www.biwascheme.org/

Expected:
Scheme interpreter written in JavaScript http://www.biwascheme.org/

Hi,

I found ./bin/biwas does not load the development version of BiwaScheme (i.e. release/node_biwascheme.js.)

Before 25321cb , "$ ./node_modules/biwascheme/bin/biwas" loaded ./node_modules/biwascheme/lib/biwascheme.js. It is good to have a handy way to evaluate some expressions on the terminal.

@kenpratt: May I revert that commit? Or do you have any good idea to fix it?

It seems that we don't need .npmignore because the npm package (biwascheme-0.6.1.tgz) only contains package.json, bin/biwas, lib/.notempty and lib/biwascheme.js. (you can download it from http://search.npmjs.org/#/biwascheme )

Tried doing a classic (* #(1 2 3) #(1 2 3)) without success... Interpreter just stands blinking with ... prompt.. Have not looked into code yet, so I don't know if this ain't a feature or if it is a bug.

bscm.html:

<html>
  <body>
    <script src="http://www.biwascheme.org/repos/release/biwascheme.js">
      (load "bscm.scm")
    </script>
  </body>
</html>

bscm.scm:

(define (f x) x)

On Firefox 11.0, bscm.html causes a syntax error. The following messages are printed on Web Console (Ctrl + Shift + K).

[19:25:14.288] 構文エラーです。 @ file:///C:/Documents%20and%20Settings/manabu/work/bscm.scm:1
[19:25:14.293] txt.replace is not a function @ http://www.biwascheme.org/repos/release/biwascheme.js:11575

Biwascheme implements the "mod" procedure but not "modulo" or "remainder."

R4RS and R5RS require:

remainder Scheme Procedure
Return the remainder of the numbers x and y.

(remainder 13 4) => 1
(remainder -13 4) => -1

modulo Scheme Procedure
Return the modulo of the numbers x and y.

(modulo 13 4) => 1
(modulo -13 4) => 3

I've been trying to build an n*n tic-tac-toe game with Biwascheme, and lately, I've been encountering this weird issue where several values are getting replaced by

#("argument" #("refer-global"  #"con
s" #("shift" 2 #("tco_hinted_apply"))))

and cause random errors when I test. I'm running them all using biwascheme 0.6.4 and Firefox 47

Two examples include:

(define (make-list n val)
   (if (zero? n)
       '()
       (cons val (make-list (- n 1)))))

and for a non-trivial example: this

Tested the above, and does not produce errors in Gambit-in-the-browser.

EDIT: Clarity, details and links

The following session illustrates the bug:

BiwaScheme Interpreter version 0.6.1
Copyright (C) 2007-2010 Yutaka HARA and the BiwaScheme team
biwascheme> (define (f x) (define y x) x)
biwascheme> (f 3)
=> 3
biwascheme> y
=> 3

y should be undefined.

I found: (delay expression), (force promise) and (make-promise (lambda () expression))
in the source code but are they already implemented in biwascheme?

I found a working implementation of those syntax elements in https://bluishcoder.co.nz/jsscheme/ but I have no idea how to extend biwascheme accordingly.

Would be a really help to have those functions for creating streams and similar concepts.

I have integrated biwascheme into KLIPSE.
Take a look here: http://blog.klipse.tech/scheme/2016/09/11/scheme-tutorial-1.html

I'm looking for example code that use libraries like reactjs. That is javascript libraries that are declare the view and patch the dom to render it.

Thanks!

I was writing a procedure that would take a string and output a list where all instances of param rep was replaced by param sub

Full code here

testing the code using the coimmand using the [repl](http://www.biwascheme.org./demo/repl.html] from biwascheme.org)
(replace-split "aeaeaeur" #\e #\a)

returned
(#\r #\a #\r #\a #\r #\a #\r #\r)

I tested this using other lists, and the result was the same, all of the characters not replaced with param sub got replaced with the last item on the string. I got the same results with numbers, letters and spaces.

I checked by manually going through the instructions in the code and applying them to the string example above, and got the expected result. I also verified this by running the same code using the repl at JsScheme, and at Gambit-js and all returned the expected results as described in the procedure.

Interpreter cycles on some errors and doesn't evaluate further input. For example:

biwascheme> (lambda x)
Error: Invalid lambda: (lambda x)
[USER]: undefined: Error: Invalid lambda: (lambda x)
[undefined]: undefined
biwascheme> (+)
Error: Invalid lambda: (lambda x)
[USER]: undefined: Error: Invalid lambda: (lambda x)
[undefined]: undefined

have to restart BiwaScheme to get rid of the error

biwascheme> (+)
=> 0
biwascheme> (if #t)
Cannot read property 'car' of undefined
[USER]: undefined: Cannot read property 'car' of undefined
[undefined]: undefined
biwascheme> (+)
Cannot read property 'car' of undefined
[USER]: undefined: Cannot read property 'car' of undefined
[undefined]: undefined

BiwaScheme Interpreter version 0.6.3.dev

When I run a ill-formed expression

(1 . 2)

(not '(1 . 2) , which is correct syntax) on "Try it now" on the web page,
I get a error

x.cdr.to_array is not a function
[USER]: http://www.biwascheme.org/release/biwascheme.js: x.cdr.to_array is not a function

in red characters and the interperter stops.

I think that it is caused on 557th line of src/system/interperter.js , which is

        var expanded_cdr = BiwaScheme.array_to_list(
                             _.map(x.cdr.to_array(),
                                   function(item){ return expand(item, flag); }));

and that you should check if x.cdr.to_array is available.

All we need is stack trace, right? :-)

At least, names of called functions should be shown.

Not really an issue, I just wanted some insight as to, how to add 'match' within BiwaScheme