On 07.08.2013 10:58, Tilak Thapa wrote: > (defn get-data > [& attrs] > (let [grps data] > (if (empty? attrs) > grps > (map #(select-keys % attrs) grps)))) > > (filter #(= (% :id) 7) (get-data :id :b)) > > Why above expression works but same expression wrapped as function > (below) does not work? > > (defn get-data-by-id [id & attrs] > "always pass :id attribute" > (filter #(= (:id %) id) (get-data attrs))) > > (get-data-by-id 3) ;; returns () this is probably ok (?) since :id key > is not available > (get-data-by-id 3 :id :b) ;; returns () but why this does not work?
`get-data-by-id` passes one argument to `get-data`: a sequence of attributes. `get-data-by-id` expects one argument per attribute. Instead of `(get-data attrs)`, use `(apply get-data attrs)`. See http://clojuredocs.org/clojure_core/clojure.core/apply for examples demonstrating the use of `apply`. -- Timo -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
