Here's a gist of the current draft: https://gist.github.com/anonymous/8587032
I must admit that I do not have very extensive tests yet, and I may
mistreat some edge cases. I am not sure if that matters. I'll paste my
tiny "test suite" at the bottom of this message.
Thanks,
--
Raul
<html><head><title>tests for a.js</title></head>
<body>
<pre id="out"></pre>
<script src="a.js"></script>
<script>
window.out= function(t) {
var log= document.getElementById('out');
log.innerHTML+= t;
return t;
}
function maintain(f) {
var r;
try {
r= f();
} catch (e) {
var t= f+' failed '+e;
alert(out(t));
r= A.one;
}
if ((r instanceof A) && 1 === r.DATA[0]) {out('.\n');} else {out(f+'
failed '+r+'.\n');}
}
window.v123= A(3).indices().plus(1);
window.m1to9= A([3,3]).reshape(A(9).indices());
maintain(function(){return v123.times(2).match(A([2,4,6]))});
// maintain(function(){return v123.take(2).match(A([1,2]))});
maintain(function(){return
m1to9.dot('plus','times')(m1to9).match(A([3,3],[15,18,21,42,54,66,69,90,111]))});
maintain(function(){return
m1to9.dot('plus','times')(A([3,2],[1,2,1])).match(A([3,2],[5,3,17,15,29,27]))});
maintain(function(){return v123.dot('plus','times')(v123).match(A(14))});
maintain(function(){return v123.match(A([1,2,3]))});
maintain(function(){return v123.reduce('plus').match(A(6))});
</script>
</body></html>
On Thu, Jan 23, 2014 at 12:50 PM, Joe Bogner <[email protected]> wrote:
> Raul, your library sounds interesting. Please share more if you can later.
>
> Coffeescript is a fun language. The lambda syntax and lack of braces
> make it feel closer to the problem domain than native javascript. It
> also makes it harder to shoot yourself in the foot. The debugging and
> compilation has greatly improved over the years too. The compiler
> throws useful errors with line numbers etc.
>
> I agree that toys are useful for learning. It's common in the land of
> lisp to write a toy interpreter to better understand the language. I
> did that too and found putting this one together a nice break
>
> On Thu, Jan 23, 2014 at 12:12 PM, Raul Miller <[email protected]> wrote:
>> I've been building an vsapl-like javascript library. I want that so
>> that I can code webgl without having to round-trip to jhs for minor
>> array manipulation. It's pretty simple since I only support one
>> numeric type (javascript numbers) in the arrays. So basically it's a
>> functional object library with a shape/data pair representing an array
>> - so for webgl arrays I basically can just extract the data and use it
>> "as-is". (I say "functional object library" because I use a
>> javascript object to represent each array, and monadic functions are
>> niladic methods ("this" is the right argument) which return a new
>> array while dyadic functions are single argument methods which also
>> return a new array ("this" is the left argument). Or at least, that's
>> how I currently have it wired up.)
>>
>> I'm not using git for my versioning, yet, because it's so trivial I
>> work better at this stage with a file for each version. I should
>> probably just stop working on it, and get back to coding webgl, but
>> coffeescript looks fun and I would like to compare code size and
>> simplicity between a native javascript implementation and a
>> coffeescript implementatin).
>>
>> I am using the vsapl semantics because they seem simpler to implement
>> for the subset of functionality I need (numeric operations on small
>> arrays, when using javascript) than the full J semantics. Also,
>> browsers have intentionally crippled functionality so any significant
>> use of the library would want jhs for heavy lifting.
>>
>> Anyways, toys are good for learning, and I've been struggling with
>> concepts of what I should be doing that's worthwhile for other people,
>> and if nothing else, this is a sometimes relaxing effort.
>>
>> Thanks,
>>
>> --
>> Raul
>>
>>
>> On Thu, Jan 23, 2014 at 11:56 AM, Joe Bogner <[email protected]> wrote:
>>> Thanks for the feedback. I just added in the insert adverb and pushed
>>> the code. It makes it feel more like APL now since I can do the
>>> prototypical +/1,2,3,4.
>>>
>>> Implementing forks might be up next (fun). Then I can do the J "hello
>>> world" of (+/%#) 5,10,15
>>>
>>> On Thu, Jan 23, 2014 at 11:41 AM, Raul Miller <[email protected]> wrote:
>>>> I like this, and I think it is time I learn coffeescript. This relates
>>>> to some other efforts of mine.
>>>>
>>>> Thank you,
>>>>
>>>> --
>>>> Raul
>>>>
>>>>
>>>> On Thu, Jan 23, 2014 at 11:20 AM, John Baker <[email protected]> wrote:
>>>>> Interesting. I don't know cofffescript but it's not hard to figure out
>>>>> what's going on here.
>>>>>
>>>>>
>>>>> On Wed, Jan 22, 2014 at 9:22 PM, Joe Bogner <[email protected]> wrote:
>>>>>
>>>>>> I ported Arthur Whitney's one page APL interpreter fragment[1] to
>>>>>> coffeescript (which enables it to run in javascript) as learning
>>>>>> exercise.
>>>>>>
>>>>>> http://csilo.com/dev/apljs.html
>>>>>>
>>>>>> code is here: https://github.com/joebo/apl-js/blob/master/apl.coffee
>>>>>>
>>>>>> This could be extended to create in-browser games/learning exercises.
>>>>>> Of course, it would also make sense to change the symbols to J. I kept
>>>>>> the original ones for historical reasons for now.
>>>>>>
>>>>>> [1] - http://www.jsoftware.com/jwiki/Essays/Incunabulum
>>>>>> [2] - http://www.jsoftware.com/papers/AIOJ/AIOJ.htm
>>>>>> ----------------------------------------------------------------------
>>>>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> John D. Baker
>>>>> [email protected]
>>>>> ----------------------------------------------------------------------
>>>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>>> ----------------------------------------------------------------------
>>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>> ----------------------------------------------------------------------
>>> For information about J forums see http://www.jsoftware.com/forums.htm
>> ----------------------------------------------------------------------
>> For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
