Re: [racket-users] A dict? question
Exactly. `'e` is a reader macro that gets read as `(quote e)`.
When it's already under a quote, the quoted quote is treated as a symbol:
> (dict-ref '('yay) 'quote)
'(yay)
> (quote ((quote yay)))
'('yay)
> '((quote yay))
'('yay)
> (dict-ref '((quote yay)) 'quote)
'(yay)
--
William J. Bowman
On Sun, Feb 28, 2021 at 01:45:56AM +0200, Yury Bulka wrote:
> Indeed,
>
> > (dict-keys '('yay))
> '(quote)
> > (dict-values '('yay))
> '((yay))
> > (dict-ref '('yay) 'quote)
> '(yay)
>
> So... this boils down to:
>
> > (equal? '('yay) '((quote yay)))
> #t
>
> --
> Yury Bulka
> https://mamot.fr/@setthemfree
> #NotOnFacebook
>
>
>
> William J. Bowman writes:
>
> > try (dict-ref ‘(‘yay) ‘quote)
>
> --
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Re: [racket-users] A dict? question
Indeed,
> (dict-keys '('yay))
'(quote)
> (dict-values '('yay))
'((yay))
> (dict-ref '('yay) 'quote)
'(yay)
So... this boils down to:
> (equal? '('yay) '((quote yay)))
#t
--
Yury Bulka
https://mamot.fr/@setthemfree
#NotOnFacebook
William J. Bowman writes:
> try (dict-ref ‘(‘yay) ‘quote)
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Re: [racket-users] A dict? question
try (dict-ref ‘(‘yay) ‘quote)
--
Sent from my phoneamajig
> On Feb 27, 2021, at 15:31, Yury Bulka wrote:
>
> Dear Racketeers,
>
> I have noticed something I don't understand:
>
>> (dict? '(yay))
> #f
>> (dict? '('yay))
> #t
>> (dict-ref '('yay) 'yay)
> ; dict-ref: no value for key: 'yay in: '('yay)
>
> I'm puzzled - what makes '('yay) a dict compared to '(yay)?
>
> (Running Racket 7.8 on Linux).
>
> --
> Yury Bulka
> https://mamot.fr/@setthemfree
> #NotOnFacebook
>
>
> --
> You received this message because you are subscribed to the Google Groups
> "Racket Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to racket-users+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/racket-users/87mtvpf5pa.fsf%40privacyrequired.com.
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[racket-users] A dict? question
Dear Racketeers,
I have noticed something I don't understand:
> (dict? '(yay))
#f
> (dict? '('yay))
#t
> (dict-ref '('yay) 'yay)
; dict-ref: no value for key: 'yay in: '('yay)
I'm puzzled - what makes '('yay) a dict compared to '(yay)?
(Running Racket 7.8 on Linux).
--
Yury Bulka
https://mamot.fr/@setthemfree
#NotOnFacebook
--
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