You may also like this answer using DataScript to solve a similar problem:
http://stackoverflow.com/questions/39712460/how-to-map-different-values-from-2-sets-in-clojure-based-on-unique-value/39714081#39714081 On Tue, Oct 18, 2016 at 6:09 AM, Moe Aboulkheir <m...@nervous.io> wrote: > (defn join* [d1 c1 d2 c2] > (clojure.set/join (into #{} d1) (into #{} d2) {c1 c2})) > > Or else look at the implementation of set/join. > > Take care, > Moe > > On Tue, Oct 18, 2016 at 9:41 AM, <evgeniy.kurpa...@gmail.com> wrote: > >> Hey guys, i'm beginner and need help. >> >> I have a task: >> >> ;; (join* (join* student-subject :student_id student :id) :subject_id >> subject :id) >> ;; => [{:subject "Math", :subject_id 1, :surname "Ivanov", :year 1998, >> :student_id 1, :id 1} >> ;; {:subject "Math", :subject_id 1, :surname "Petrov", :year 1997, >> :student_id 2, :id 2} >> ;; {:subject "CS", :subject_id 2, :surname "Petrov", :year 1997, >> :student_id 2, :id 2} >> ;; {:subject "CS", :subject_id 2, :surname "Sidorov", :year 1996, >> :student_id 3, :id 3}] >> ;; >> ;; Hint: reduce, conj, merge, first, filter, get >> ;; Here column1 belongs to data1, column2 belongs to data2. >> (defn join* [data1 column1 data2 column2] >> ) >> >> so.. i'm trying to write join (defn join* [data1 col1 data2 col2] ... ) >> data1 and data2 like: ({:key1 val1 :key2 val2} {:key1 val3 :key2 val4}) >> after => example result. >> >> -- >> 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. >> > > -- > 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. > -- 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.
