I am unsure of your question then - what you pasted is correct.
On the linked page it shows a slightly different output:
(old-book->new-book {:title "Wild Seed", :authors [octavia]})
;=> {:title "Wild Seed", :authors #{octavia}}
The "#{}" syntax is a literal set, that is all. It isn't rendering the
contents of octavia, merely indicating that it is a set with a single item
in, that item being the var octavia.
Maybe if you rephrase the question that might help?
On Monday, 27 October 2014 14:10:37 UTC, Roelof Wobben wrote:
>
> Nope, the exercise I stated this :
>
> (old-book->new-book {:title "Wild Seed", :authors [octavia]})
>
>
> See exercise 22 on this page :
> http://iloveponies.github.io/120-hour-epic-sax-marathon/structured-data.html#exercise-22
>
> Roelof
>
>
> Op maandag 27 oktober 2014 14:52:23 UTC+1 schreef Colin Yates:
>
>> (get book :authors) is saying "return the value of the ":authors" key in
>> the "book" map. You provided {:title... :authors [octavia]} as the "book"
>> map, the value of "authors" being a vector with a single element. That
>> single element being "{:name "Octavia E. Butler"
>>
>> :birth-year 1947
>> :death-year 2006}"
>>
>>
>> In other words, it is all working correctly.
>>
>>
>> Did you mean (old-book->new-book {:title "Wild Seed", :authors (:name
>> octavia)}) ?
>>
>>
>>
>> On Monday, 27 October 2014 13:45:45 UTC, Roelof Wobben wrote:
>>>
>>> Hello,
>>>
>>> I have this "facts".
>>>
>>> (def octavia {:name "Octavia E. Butler"
>>> :birth-year 1947
>>> :death-year 2006})
>>>
>>>
>>> (def wild-seed {:title "Wild Seed", :authors [octavia]})
>>>
>>>
>>>
>>> So I thought when I do this :
>>>
>>>
>>> (defn old-book->new-book [book]
>>> (get book :authors))
>>>
>>>
>>> (old-book->new-book {:title "Wild Seed", :authors [octavia]})
>>>
>>>
>>> I see this output : [{:death-year 2006, :name "Octavia E. Butler",
>>> :birth-year 1947}]
>>>
>>> where I expected it to be octavia or octavia E. Butler
>>>
>>>
>>> Can someone explain why I see the wrong output ?
>>>
>>>
>>> Roelof
>>>
>>>
>>>
>>>
>>> But I see this output :
>>>
>>>
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