From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marco Wahl <marcowahlsoft@gmail.com>
Subject: Re: ob-calc duplicate stack-element issue
Date: Wed, 18 Mar 2020 17:23:39 +0100
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In-Reply-To: <87fte57jd2.fsf@ucl.ac.uk> (Eric S. Fraga's message of "Wed, 18
 Mar 2020 15:50:17 +0000")
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To: e.fraga@ucl.ac.uk
Cc: Heiko Schmidt <Heiko.Schmidt@webbedtables.de>, emacs-orgmode@gnu.org

Eric S Fraga <e.fraga@ucl.ac.uk> writes:

> On Wednesday, 18 Mar 2020 at 15:47, Marco Wahl wrote:
>> AFAICS at the org babel calc evaluation the last value of the calc stack
>> gets dropped.
>>
>> So your workaround is okay, I think.  You can just write any dummy
>> element at the bottom of each block e.g. just 0.  No need of
>> duplication.  Looks a bit hackish to me but so what?
>
> Indeed hackish.  But it does beg the question: why does ob-calc pop the
> stack?  I cannot see any use case given that the stack is essentially
> infinite and can be safely ignored (in most if not all cases).
>
> Could the solution be to simply remove the =(calc-pop 1)= line at the
> end of =org-babel-execute:calc= function?
>
> Just a thought.

Possibly the originators thought about the typical use of calc blocks as
units which reduce to the top element of the stack.  In this case the
calc-pop would be the right step to clean the stack.

Just another thought.


Ciao,
-- Marco