[Jprogramming] Am I understanding m/y ?

[bill lam]

In DOJ, but inside Introduction part

http://www.jsoftware.com/help/dictionary/intro21.htm

to recap,
   x=.4

   +`*/1,x,3,x,3,x,1
125
   1 + x * 3 + x * 3 + x * 1
125
   1 * x + 3 * x + 3 * x + 1
61


Пн, 22 фев 2016, Raul Miller написал(а):
> http://www.jsoftware.com/help/dictionary/d420.htm says:
> 
> m/y inserts successive verbs from the gerund m between items of y,
> extending m cyclically as required. Thus, +`*/i.6 is 0+1*2+3*4+5
> 
> But it does not include an example of m/y where y contains an odd
> number of elements.
> 
> From the description, I would expect +`*/3 4 5 to give the result 3*4+5
> 
> However:
>    3*4+5
> 27
>    +`*/3 4 5
> 23
> 
> I'm thinking that this might be a bug in the interpreter.
> 
> Is there some application, though, that requires the current behavior?
> 
> Thanks,
> 
> -- 
> Raul
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm

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