I think you're confused on the terminal output. Try typing [octavia] in the
repl, and compare the output you get to the above code.
Clojure prints out the raw values of any computation, not variable names.
On Mon, Oct 27, 2014 at 9:45 AM, Roelof Wobben <rwob...@hotmail.com>
wrote:
> Op maandag 27 oktober 2014 16:37:49 UTC+1 schreef James Reeves:
>>
>> On 27 October 2014 13:45, Roelof Wobben <rwo...@hotmail.com <javascript:>>
>> wrote:
>>
>>> Hello,
>>>
>>> I have this "facts".
>>>
>>> (def octavia {:name "Octavia E. Butler"
>>> :birth-year 1947
>>> :death-year 2006})
>>>
>>>
>> So you've assigned the var "octavia" to the data structure:
>>
>> {:death-year 2006, :name "Octavia E. Butler", :birth-year 1947}
>>
>>
>> (def wild-seed {:title "Wild Seed", :authors [octavia]})
>>>
>>>
>> Here you've assigned the var "wild-seed" to:
>>
>> {:title "Wild Seed", :authors [octavia]}
>>
>>
>> Which is the same as:
>>
>> {:title "Wild Seed", :authors [{:death-year 2006, :name "Octavia E. Butler",
>> :birth-year 1947}]}
>>
>>
>> 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]})
>>>
>>>
>> Okay, so work through your code. You start with:
>>
>> (old-book->new-book {:title "Wild Seed", :authors [octavia]})
>>
>>
>> Resolving this gets:
>>
>> (get {:title "Wild Seed", :authors [octavia]} :authors)
>>
>>
>> Resolving this gets:
>>
>> [octavia]
>>
>>
>> Which resolves to:
>>
>> [{:death-year 2006, :name "Octavia E. Butler", :birth-year 1947}]
>>
>>
>> I'm not sure why you'd expect anything else. Did you not expect "octavia"
>> to resolve?
>>
>> - James
>>
>>
> I think I do not fully understand how clojure works as a beginner.
> As far as I see it I have to find a way to stop with [octavia] so I can
> make a set of it.
> Roelof
>
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