nope, there is somewhere a error in the example.
When I copie it as you made it then I see this error message :
RuntimeException Unmatched delimiter: } clojure.lang.Util.runtimeException
(Util.java:219)
when I add a extra ) I see this message :
RuntimeException Map literal must contain an even number of forms
clojure.lang.Util.runtimeException (Util.java:219)
Roelof
Op maandag 27 oktober 2014 20:46:49 UTC+1 schreef James Reeves:
> On 27 October 2014 19:37, Roelof Wobben <rwo...@hotmail.com <javascript:>>
> wrote:
>
>> of course I can.
>>
>> If I look at answers other people gives then this is the solution :
>>
>> (defn old-book->new-book [book]
>> (assoc book :authors (set (book :authors)))
>> )
>>
>> and then according to the explanation I would see this output ;
>>
>> (old-book->new-book {:title "Wild Seed", :authors [octavia]});=> {:title
>> "Wild Seed", :authors #{octavia}}
>>
>> but on 1.6.0 and on 1.5.1 I see another output as discussed here.
>>
>>
> I don't think you're understanding that:
>
> {:title "Wild Seed", :authors #{{:name "Octavia E. Butler", :birth-year 1947,
> :death-year 2006}}}
>
> Evaluates to the same thing as:
>
> {:title "Wild Seed", :authors #{octavia}}
>
> The difference is that in the first value, "octavia" has been replaced
> with its value.
>
> You can confirm the two data structures are the same by checking their
> equality:
>
> (= {:title "Wild Seed", :authors #{{:name "Octavia E. Butler", :birth-year
> 1947, :death-year 2006}}
> {:title "Wild Seed", :authors #{octavia}}}
>
> This should return true.
>
> - James
>
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