if you (or a user) are calling your function from J code, add the x to any
"literal numbers".
If your very large number is the result of a calculation, then you can ensure
that it is returned as extended.
If the input comes from elsewhere/other program, then pass it as a string.
".@,&'x' '1239810239812039812039812039180319283019283'
1239810239812039812039812039180319283019283
On Friday, August 11, 2023 at 08:29:47 p.m. EDT, Ak O <akin...@gmail.com>
wrote:
For me,
(x: y)
does not preserve the input.
The result I get is not the same.
( x:180548043269214561950911457875657 )
180548043269214573494164592263168
This does not work.
180548043269214561950911457875657x
180548043269214561950911457875657
This does work.
On Fri., Aug. 11, 2023, 13:01 Henry Rich, <henryhr...@gmail.com> wrote:
> (x: value) produces extended version of value.
>
> Henry Rich
>
> On Fri, Aug 11, 2023, 2:44 PM Ak O <akin...@gmail.com> wrote:
>
> > Hi everybody, I hope you are all well.
> >
> > I have a question about the Anagram ( A. ) operator.
> >
> > In a defined function, how do I designate that an input 'x' is treatment
> > as extended datatype rather than float?
> >
> > Where being defined:
> > 13 : ' x A. i.y'
> > [ A. [: i. ]
> >
> > is to be taken as,
> > 13 : 'X_INPUTx A. y' NB. 12345672345467x A. i.y
> >
> > How do I get the affect of catenating an 'x' to the end of a number in a
> > defined function?
> >
> > If you understand my question ignore below, otherwise I give an example.
> >
> > Thank you for your thoughts.
> >
> > Ak
> >
> >
> > My understanding of the Anagram operator (A.).
> > The vocabulary reference page (acapdot) gives the product of the Anagram
> > index function
> > A. y
> > as datatype extended.
> >
> >
> > The Anagram function
> > x A. y
> > applies the permutation map (x) on ordered vector sequence (y) as below.
> >
> >
> > ] vector_sequence =: ?~30
> > 20 12 4 29 7 17 22 11 2 27 28 23 6 21 9 3 24 10 26 13 15 1 18 8 25 19 0 5
> > 16 14
> >
> >
> > ] vector_anagram =: A. vector_sequence
> > 180548043269214561950911457875657
> >
> > The Noun, vector_anagram will have datatype extended, given by:
> > datatype vector_anagram
> > extended
> >
> > Applying the vector_anagram on a vector using the command:
> > vector_anagram A. i.30
> > 20 12 4 29 7 17 22 11 2 27 28 23 6 21 9 3 24 10 26 13 15 1 18 8 25 19 0 5
> > 16 14
> >
> > The expected result.
> >
> > In a case where the digits are input on there own, the following fails
> with
> > 'domain error, executing dyad A.'
> >
> > 180548043269214561950911457875657 A. i.30
> >
> > One approach is to place 'x:' before the input.
> > ( x:180548043269214561950911457875657 )A. i.30
> > 20 12 4 29 7 17 22 11 2 27 28 25 1 8 0 15 16 14 3 5 19 26 18 6 21 23 13
> 24
> > 9 10
> >
> > This is not the expected result.
> >
> > The input is treated as 180548043269214573494164592263168.
> >
> > ( x:180548043269214561950911457875657 )
> > 180548043269214573494164592263168
> >
> > Not the input I thought I was applying.
> >
> > An alternative is to postfix an 'x' to the end of the input.
> > 180548043269214561950911457875657x A. i.30
> > 20 12 4 29 7 17 22 11 2 27 28 23 6 21 9 3 24 10 26 13 15 1 18 8 25 19 0 5
> > 16 14
> >
> > The expected result. But how do I achieve this for a defined function.
> >
> > Does not work either.
> > ".@((":vector_anagram),x')"_ NB. same as x:
> >
> >
> > Maybe there is a symbol that 13 : can be recognize to trigger the
> extended
> > datatype.
> >
> >
> >
> > Thank you for your help.
> >
> > Ak
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> >
> ----------------------------------------------------------------------
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>
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