more concise:
(defn enmap [args]
(reduce #(hash-map %2 %1) (reverse args)))
2011/3/11 Takahiro <fat...@googlemail.com>:
> Interesting. Here is my attempt.
>
> (defn enmap [args]
> (let [[fs & res] (reverse args)]
> (reduce (fn [v k] (hash-map k v)) fs res)))
>
>> (enmap [1 2 3 4 {5 6 7 8}])
> => {1 {2 {3 {4 {5 6, 7 8}}}}}
>
>
>>(let [[tail more] ((juxt last (comp reverse butlast)) [1 2 3 4 {5 6 7 8}])]
>> (reduce #(hash-map %2 %1) tail more))
> I still cannot understand what is going on in this code. juxt always
> make my head crashed.
>
> Thanks.
>
> 2011/3/11 Damien Lepage <damienlep...@gmail.com>:
>> Hi
>>
>> I wrote a function to transform a variable number of arguments into embedded
>> maps.
>> Here is what it does:
>>> (enmap 1 2)
>> {1 2}
>>> (enmap 1 2 3)
>> {1 {2 3}}
>>> (enmap 1 2 3 4)
>> {1 {2 {3 4}}}
>>> (enmap 1 2 3 4 {5 6 7 8})
>> {1 {2 {3 {4 {5 6, 7 8}}}}}
>> Here is my implementation:
>> (defn enmap [arg & args]
>> (if-let [more (butlast args)]
>> (let [k (last more), v (last args)]
>> (if-let [even-more (butlast more)]
>> (apply enmap arg (concat even-more (list (hash-map k v))))
>> (enmap arg (hash-map k v))))
>> (apply hash-map arg args)))
>> Two things bother me:
>>
>> Is there a way to make this function less complicated? without recursion
>> maybe?
>> Is there something simpler than (concat even-more (list (hash-map k v)) to
>> append an element at the end of a sequence?
>>
>> Thanks
>> --
>> Damien
>>
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