* Why is result of `car' ⇒ quote ?
@ 2022-06-14 8:28 Jean Louis
2022-06-14 8:31 ` Po Lu
2022-06-14 10:16 ` Emanuel Berg
0 siblings, 2 replies; 5+ messages in thread
From: Jean Louis @ 2022-06-14 8:28 UTC (permalink / raw)
To: Help GNU Emacs
Here I do not understand it quite, why do I get result of `car' below,
to be `quote'?
(nth 2 (car exporters)) ⇒ '("Block 227, Plot 20086, Kakajja Zone")
(car (nth 2 (car exporters))) ⇒ quote
Jean
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Why is result of `car' ⇒ quote ?
2022-06-14 8:28 Why is result of `car' ⇒ quote ? Jean Louis
@ 2022-06-14 8:31 ` Po Lu
2022-06-14 10:16 ` Emanuel Berg
1 sibling, 0 replies; 5+ messages in thread
From: Po Lu @ 2022-06-14 8:31 UTC (permalink / raw)
To: Jean Louis; +Cc: Help GNU Emacs
Jean Louis <bugs@gnu.support> writes:
> Here I do not understand it quite, why do I get result of `car' below,
> to be `quote'?
>
> (nth 2 (car exporters)) ⇒ '("Block 227, Plot 20086, Kakajja Zone")
> (car (nth 2 (car exporters))) ⇒ quote
'("Block 227, Plot 20086, Kakajja Zone") is simply read syntax for
(quote "Block 227, Plot 20086, Kakajja Zone").
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Why is result of `car' ⇒ quote ?
2022-06-14 8:28 Why is result of `car' ⇒ quote ? Jean Louis
2022-06-14 8:31 ` Po Lu
@ 2022-06-14 10:16 ` Emanuel Berg
2022-06-14 10:24 ` Emanuel Berg
1 sibling, 1 reply; 5+ messages in thread
From: Emanuel Berg @ 2022-06-14 10:16 UTC (permalink / raw)
To: help-gnu-emacs
Jean Louis wrote:
> Here I do not understand it quite, why do I get result of
> `car' below, to be `quote'?
>
> (nth 2 (car exporters)) ⇒ '("Block 227, Plot 20086, Kakajja Zone")
> (car (nth 2 (car exporters))) ⇒ quote
And the answer is ...
You have quoted the list twice!
(setq exporters '((1 2 '("Block 227, Plot 20086, Kakajja Zone"))))
(nth 2 (car exporters)) ; '("Block 227, Plot 20086, Kakajja Zone")
(car (nth 2 (car exporters))) ; quote
--
underground experts united
https://dataswamp.org/~incal
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Why is result of `car' ⇒ quote ?
2022-06-14 10:16 ` Emanuel Berg
@ 2022-06-14 10:24 ` Emanuel Berg
2022-06-14 21:53 ` Why is result of `car' ⇒ quote ? [SOLVED] Jean Louis
0 siblings, 1 reply; 5+ messages in thread
From: Emanuel Berg @ 2022-06-14 10:24 UTC (permalink / raw)
To: help-gnu-emacs
>> Here I do not understand it quite, why do I get result of
>> `car' below, to be `quote'?
>>
>> (nth 2 (car exporters)) ; ("Block 227, Plot 20086, Kakajja
>> Zone") (car (nth 2 (car exporters))) ; quote
>
> And the answer is ...
>
> You have quoted the list twice!
>
> (setq exporters '((1 2 '("Block 227, Plot 20086, Kakajja Zone"))))
>
> (nth 2 (car exporters)) ; '("Block 227, Plot 20086, Kakajja Zone")
>
> (car (nth 2 (car exporters))) ; quote
Instead of quoting the list twice, use `list' three times
(setq exporters (list (list 1 2 (list "Block 227, Plot 20086, Kakajja Zone"))))
(nth 2 (car exporters))
(car (nth 2 (car exporters))) ; "Block 227, Plot 20086, Kakajja Zone"
and then it works :)
--
underground experts united
https://dataswamp.org/~incal
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Why is result of `car' ⇒ quote ? [SOLVED]
2022-06-14 10:24 ` Emanuel Berg
@ 2022-06-14 21:53 ` Jean Louis
0 siblings, 0 replies; 5+ messages in thread
From: Jean Louis @ 2022-06-14 21:53 UTC (permalink / raw)
To: help-gnu-emacs
* Emanuel Berg <incal@dataswamp.org> [2022-06-14 13:27]:
> >> Here I do not understand it quite, why do I get result of
> >> `car' below, to be `quote'?
> >>
> >> (nth 2 (car exporters)) ; ("Block 227, Plot 20086, Kakajja
> >> Zone") (car (nth 2 (car exporters))) ; quote
> >
> > And the answer is ...
> >
> > You have quoted the list twice!
> >
> > (setq exporters '((1 2 '("Block 227, Plot 20086, Kakajja Zone"))))
> >
> > (nth 2 (car exporters)) ; '("Block 227, Plot 20086, Kakajja Zone")
> >
> > (car (nth 2 (car exporters))) ; quote
>
> Instead of quoting the list twice, use `list' three times
>
> (setq exporters (list (list 1 2 (list "Block 227, Plot 20086, Kakajja Zone"))))
> (nth 2 (car exporters))
> (car (nth 2 (car exporters))) ; "Block 227, Plot 20086, Kakajja Zone"
>
> and then it works :)
That is what I did now, thanks.
--
Jean
Take action in Free Software Foundation campaigns:
https://www.fsf.org/campaigns
In support of Richard M. Stallman
https://stallmansupport.org/
^ permalink raw reply [flat|nested] 5+ messages in thread
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2022-06-14 8:28 Why is result of `car' ⇒ quote ? Jean Louis
2022-06-14 8:31 ` Po Lu
2022-06-14 10:16 ` Emanuel Berg
2022-06-14 10:24 ` Emanuel Berg
2022-06-14 21:53 ` Why is result of `car' ⇒ quote ? [SOLVED] Jean Louis
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