Thanks Meikel for the prompt reply, that does it.
Please can you elaborate on how I can use the solution below to update a
particular entry in the vector.
[{:id 1 :email {"a...@mail.com 1}}
{:id 2 :email {"d...@mail.com 1}}
{:id 3 :email {"g...@mail.com 2}}]
So I will like to write a function that accepts an id and then updates the
counter in email section of the given id.
(defn update-counter [x xs]
(dosync
(alter result ......
Thanks again for your time.
On Monday, June 3, 2013 9:23:47 PM UTC+1, Meikel Brandmeyer (kotarak) wrote:
>
> Hi,
>
> Am Montag, 3. Juni 2013 22:16:54 UTC+2 schrieb Yinka Erinle:
>>
>> Given I have the following
>> (def result (ref [ { :id 1 :emails { "yi...@mail.com" 1}} ] ) )
>>
>> I like to alter the result in a transaction to become
>> [{:id 1 :emails { "yi...@mail.com" 2}}] ; increment the counter from
>> 1 to 2
>>
>> Please can someone provide pointers.
>>
>>
> You can use the uniform update principle to stitch together alter and
> update-in.
>
> (dosync
> (alter result update-in [0 :emails "a@b.c"] inc))
>
> Kind regards
> Meikel
>
>
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