There is clojure.set/join to do exactly what you are asking for:
```
(-> (clojure.set/join entities locations)
(clojure.set/rename {:id :location}))
;=> ({:name "bar", :location 101} {:name "foo", :location 100})
```
(I'm also using clojure.set/rename to rename :id to :location)
http://cloju
You’re right, I missed a step :-). Something like (typed in-line so it really
won’t compile):
:locations [{“us” 100} {“de” 101}]
:locations-seq (into {} (map (fn [{:keys [location]}] [:location (get locations
location)])…)
;; the above produces a sequence symmetrical with entities, each map cont
Not sure I follow Colin's suggestion entirely, but his suggestion led me to
this which is better. I'd still love any other suggestions to improve!
(def entities [{:name "foo" :location "us"} {:name "bar" :location "de"}])
(def locations [{:location "us" :id 100} {:location "de" :id 101}])
;; mak
I would transform the locations into {location id} and then use merge.
> On 13 Sep 2015, at 3:14 PM, Brian Platz wrote:
>
> I have a pattern that comes up frequently, when I need to merge some value
> into one map list from matching keys in a second map list.
>
> I've developed a way to handle
Hi Sean,
That works just perfect !!!
JS
On Saturday, June 16, 2012 11:58:30 AM UTC+10, Sean Corfield wrote:
>
> On Fri, Jun 15, 2012 at 7:30 AM, Baishampayan Ghose
> wrote:
> > This is how it should be done, really -
> >
> > (defn get-events-hlpr
> > "Retrieves events from MongoDB."
> >
Hi ALL,
Thanks that is exactly what i was looking for :)
On Saturday, June 16, 2012 12:30:45 AM UTC+10, Baishampayan Ghose wrote:
>
> > Hi Baishampayan,
> >
> >> (defn get-events-hlpr []
> >> "Retrieves events from MongoDB."
> >> (vec (mc/find-maps "events")))
> >
> > Is that Emacs Lisp
On Fri, Jun 15, 2012 at 7:30 AM, Baishampayan Ghose wrote:
> This is how it should be done, really -
>
> (defn get-events-hlpr
> "Retrieves events from MongoDB."
> []
> (vec (map #(dissoc :_id %) (mc/find-maps "events" ;; remove the :_id as
> well
Or in Clojure 1.4.0 and later:
(defn get
> Hi Baishampayan,
>
>> (defn get-events-hlpr []
>> "Retrieves events from MongoDB."
>> (vec (mc/find-maps "events")))
>
> Is that Emacs Lisp or Common Lisp?
>
> Bye,
> Tassilo
>
> Just nitpicking that you adapted the OP's error of adding the docstring
> after the parameter vector. ;-)
You are
Baishampayan Ghose writes:
Hi Baishampayan,
> (defn get-events-hlpr []
> "Retrieves events from MongoDB."
> (vec (mc/find-maps "events")))
Is that Emacs Lisp or Common Lisp?
Bye,
Tassilo
Just nitpicking that you adapted the OP's error of adding the docstring
after the parameter vector. ;-
> I am receiving a sequence from a particular function so I want to get that
> sequence and converted to a vector o I can return a vector instead.
>
> (defn get-events-hlpr []
> "Retrieves events from MongoDB."
> (init)
> (def items (mc/find-maps "events")) ;; get the sequence
> (loop [vtr []
> d
> You could just do (vec (mc/find-maps "events")).
>
Also, to dissoc :_id from each item, do (vec (map #(dissoc % :_id)
(mc/find-maps "events"))).
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On Friday, June 15, 2012 9:54:37 AM UTC-4, Joao_Salcedo wrote:
> Is the right way?
>
You could just do (vec (mc/find-maps "events")).
Also, using def creates a top-level var. You probably wanted (let [items
(mc/find-maps "events")] ...) instead.
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