Re: Output hash-table from a function

[Heime <heimeborgia@protonmail.com>]

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On Monday, September 23rd, 2024 at 3:59 AM, Heime <heimeborgia@protonmail.com> wrote:

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> Sent with Proton Mail secure email.
> 
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> On Monday, September 23rd, 2024 at 3:54 AM, Yuri Khan yuri.v.khan@gmail.com wrote:
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> > On Sun, 22 Sept 2024 at 22:16, Heime heimeborgia@protonmail.com wrote:
> > 
> > > > > (defun xiakos-anctr (fpln)
> > > > > 
> > > > > (if (hash-table-p fpln)
> > > > > 
> > > > > (let ( (anctr (make-hash-table :test 'equal)) )
> > > > > (maphash (lambda (waypt dirpath)
> > > > > (puthash
> > > > > waypt (not (file-directory-p dirpath))
> > > > > anctr))
> > > > > fpln)) ))
> > > > 
> > > > Hint 1: What does your function to return right now?
> > > 
> > > xiakos-anctr is certainly not returning a hash table, as I wanted
> > 
> > You are not answering the question. I am asking it because by
> > answering it you will get closer to understanding the root of your
> > issue. So, what is it returning?
 
I have made a check with (hash-table-p (xiakos-anctr flpn)) which returns
false.

What gets returned is the return from maphash, which is always nil.
 
> > > > Hint 2: You’ve created a hash table, bound it to a local variable,
> > > > then did a bunch of mutations to that hash table, and then what?
> > > 
> > > I want to call the function and store the hash table result in a let statement
> > > 
> > > (let ( (anctr (xiakos-anctr flpn)) )
> > 
> > This assumes xiakos-anctr returns the hash table. But, as you have
> > seen, it does not return it. So what happens to the hash table you
> > created in xiakos-anctr ?
 
From what I could conclude, the hash table gets lost.