On 18 April 2014 15:05, sd song <sd.s...@gmail.com> wrote: > i use clojure and korma libs. > now i need to add some search conditions to users-sql at > "need_do_something_here",i can describe it in imperative style: > > if ( nick_name != nil) > users-sql = (where users-sql (like :nick_name nick_name) > > if (max_age != nil) > users-sql = (where uses-sql (> :birthday blabla....)) > > if (min_age != nil) > users-sql = (where uses-sql (< :birthday blabla....)) > > how to do this in an elegant way with functional style?
You should be able to do something with the cond-> threading macro: (cond-> users-sql nick_name (where (like :nick_name nick_name)) max_age (where (> :birthday ...) min_age (where (< :birthday ...)) > another question is: i think code like: (if (nil? page) lmt page) is ugly. > is there some functions in clojure like (get_default_value_3_if_a_is_null a > 3) ? (or page 3) -- 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/d/optout.
