One way:
user> (reduce (fn [s [k v]]
(merge-with concat s {k [v]}))
{} [[:a 123]
[:b 124]
[:a 125]
[:c 126]
[:b 127]
[:a 100]])
=> {:c [126], :b (124 127), :a (123 125 100)}
On Tue, Feb 4, 2014 at 1:06 PM, Thomas <th.vanderv...@gmail.com> wrote:
> Hi all,
>
> I was wondering how I can convert the following data structure to the one
> below:
>
> from:
>
> [[:a 123]
> [:b 124]
> [:a 125]
> [:c 126]
> [:b 127]
> [:a 100]]
>
> to
>
> {:a [123 125 100] :b [124 127] :c [126]}
>
> All the names here are arbitrary, but there are potentially a lot more
> keys and certainly a lot more numbers. The order of things is not important.
>
> TIA,
> Thomas
>
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