Just one more way to solve it but, getting a hash-map as a result....
(->> [[1 0.5] [1 0.7] [2 1.0] [3 0.1] [3 0.1]]
(map (partial apply hash-map))
(apply merge-with +))
Em quinta-feira, 19 de março de 2015 19:02:28 UTC-3, Ambrose
Bonnaire-Sergeant escreveu:
>
> user=> (def a (group-by first [[1 0.5] [1 0.7] [2 1.0] [3 0.1] [3 0.1]]))
> #'user/a
> user=> (for [[k vs] a] [k (apply + (map second vs))])
> ([1 1.2] [2 1.0] [3 0.2])
>
>
> On Thu, Mar 19, 2015 at 3:41 PM, Alex <[email protected] <javascript:>>
> wrote:
>
>> Hello everybody,
>>
>> How to transform sequence
>>
>> *[[1 0.5] [1 0.7] [2 1.0] [3 0.1] [3 0.1]]*
>>
>> to
>>
>> *[[1 1.2] [2 1.0] [3 0.2]]*
>>
>> ?
>>
>> Best regards,
>> Alex
>>
>>
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>
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