I confirm that on the 806 release linux that: 0x1 2.7128 On Sat, Dec 16, 2017 at 12:37 PM, Henry Rich <[email protected]> wrote:
> 0x1 > > 0 > > 9!:14'' > > j806/j64/windows/release/commercial/www.jsoftware.com/2017-11-06T10:03:54 > > > Something Linux-related? > > > Henry Rich > > > > > On 12/16/2017 12:31 PM, J. Patrick Harrington wrote: > >> 0x1 >> 2.71828 >> 9!:14'' >> j806/j64/linux/release/commercial/www.jsoftware.com/2017-11-06T09:54:01 >> >> and same result on the nonavx version of 806 on my mac. >> >> On Sat, 16 Dec 2017, Henry Rich wrote: >> >>> When I try it (on a couple of different J versions) I get >>> 0x1 >>> 0 >>> 0x0 >>> 0 >>> etc. >>> >>> If your error persists please run >>> 9!:14'' >>> >>> to indicate what version you are running, and report the error again. >>> >>> Welcome to J! >>> >>> Henry Rich >>> >>> On 12/16/2017 6:19 AM, [email protected] wrote: >>> >>>> Hi. >>>> >>>> Could someone please shed some light on the following behavior: >>>> >>>> 1p1 >>>> 3.14159 >>>> 0p1 >>>> 0 >>>> 0p0 >>>> 0 >>>> 1x1 >>>> 2.71828 >>>> 0x1 >>>> 2.71828 >>>> 0x0 >>>> 0 >>>> >>>> I don't understand why 0x1 isn't the same as 0 * ^1 even though >>>> other constants seem to obey this form. I haven't found any >>>> explanation in >>>> http://www.jsoftware.com/docs/help806/dictionary/dcons.htm . >>>> >>>> <information irrelevant to the question> >>>> >>>> I am new to J and am yet to write a useful script in it, but >>>> I've already been greatly impressed by how consistent the >>>> language felt in most cases. For example, just the other day >>>> I wrote a monadic verb which took $n$ as an argument and >>>> returned $\sum_k {n \choose 3k}$. The verb was the following: >>>> >>>> a =: [:+/(3*i.)!] >>>> >>>> But if you try to pass it not a single $n$ but a list, the >>>> verb doesn't work. Which is a shame because the intended use >>>> was to examine the series. And so I started searching for >>>> something akin to Haskell's `map`. After half an hour of >>>> sifting through J tutorials that expressed delight in the >>>> fact that J lifts operations to arrays of arbitrary ranks >>>> by default and therefore doesn't need `map`, I've finally >>>> found what I was looking for, namely `a "0 i.50`, the rank >>>> operator, and it turned out that `map` isn't magic after >>>> all and is just a single case of a more general operation. >>>> I hadn't seen the rank operator in any language before and >>>> was thrilled to feel the potential that this operator holds. >>>> >>>> So the language is great, and it seems that common use cases >>>> are handled by elegant general solutions, that is, the >>>> language is designed to be mostly free from corner cases. >>>> >>>> That's why the unintuitive handling of 0x1 seems to me >>>> especially weird. I could ignore it if Python did it, if >>>> C++ did it, but J simply doesn't look like a language that >>>> intoduces inconsistencies for no reason. So it is highly >>>> probable that it's me who doesn't understand higher purpose >>>> of the construct. And so I came here hoping that someone >>>> explains it to me. The J community has a reputation of >>>> being tolerant to uninsightful questions of beginners. >>>> >>>> </information irrelevant to the question> >>>> >>>> Sorry if my English has some mistakes or is in the wrong >>>> tone. The reason isn't negligence, it's just that English >>>> isn't my native language. >>>> >>>> Regards, >>>> Dmitry Khalansky. >>>> ---------------------------------------------------------------------- >>>> For information about J forums see http://www.jsoftware.com/forums.htm >>>> >>> >>> >>> --- >>> This email has been checked for viruses by AVG. >>> http://www.avg.com >>> >>> ---------------------------------------------------------------------- >>> 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
