Hello,
I'm not seeing clearly what you're after.
Given your example, it seems that it can be solved just by the following code:
=> (def e1 [{:a 1 :b "b" :c 300 }{:a 2 :b "a" :c 500 }])
(def e2 [{:a 1 :d "blah"}{:a 2 :d "blah2"}])
#'user/e1
#'user/e2
=> (map merge e1 e2)
({:d "blah", :a 1, :b "b", :c 300} {:d "blah2", :a 2, :b "a", :c 500})
(cause map can take more than one coll)
So I think the example may not be representative, and I'm missing something ...
2011/5/10 clj123123 <ariela2...@gmail.com>:
> I wanted to merge ArrayMap in a vector. Is there a way to do that?
> I put this together but wondering it there's already a library for
> that.
>
> (defn merge-by-field
> "xt must have field vals unique"
> [xs xt field]
> (let [fmerge (fn [id s]
> (merge s (first (filter #(= id (val (find % field)))
> xt))))]
> (for [i xs]
> (fmerge (field i) i))))
>
> (def e1 [{:a 1 :b "b" :c 300 }{:a 2 :b "a" :c 500 }])
> (def e2 [{:a 1 :d "blah"}{:a 2 :d "blah2"}])
>
> (merge-by-field e1 e2 :a)
>
>
> output:
> ({:d "blah", :a 1, :b "b", :c 300} {:d "blah2", :a 2, :b "a", :c 500})
>
>
> On May 10, 9:31 am, Jonathan Fischer Friberg <odysso...@gmail.com>
> wrote:
>> use (merge e1 e2)
>>
>> Jonathan
>>
>>
>>
>> On Tue, May 10, 2011 at 6:11 PM, clj123123 <ariela2...@gmail.com> wrote:
>> > (def e1 {:a 1 :b "b" :c 300 })
>> > (def e2 {:a1 :d "blah"})
>>
>> > how to merge to get that?
>>
>> > {:a 1 :b "b" :c 300 :d "blah"}
>>
>> > also is there a way to merge if the ArrayMap was in a vector?
>>
>> > Thanks.
>>
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