Hi. This is a job for (group-by last ...)
Regards Varun J.P <varunjp...@gmail.com> schrieb am Di., 3. Juli 2018, 19:05: > My CSV file is something like the attached file which could have 'n' > number of line. I need to group by the values in the last column. > Current I believe the below code will return me a vector of vector. > > (defn read-csv-file > > [path] > > (try > > (with-open [input-file (io/reader path)] > > (let [a_list (doall (map (comp first clojure-csv.core/parse-csv) ( > line-seq input-file)))] > > (rest (into [] a_list)))) > > (catch Exception exception (throw exception)))) > > > i need to iterate through this vector of vector and create a new vector of > vector containing only elements of the first group, then in next iteration > i need the second set and so on. > > Example CSV > >> Heading1 Heading 2 Heading 3 >> abc 123 Value1 >> def 234 Value1 >> ghi dfgew Value1 >> jkl 456 Value5 >> pqr 567 Value5 >> stu 678 value3 >> vwx sdf value4 >> yza 900 value4 > > > > so when this CSV is parsed i will have something like > [ > [abc 123 Value1] > [def 234 Value1] > [ghi dfgew Value1] > [jkl 456 Value5] > [pqr 567 Value5] > [stu 678 value3] > [vwx sdf value4] > [yza 900 value4]] > So when i iterate through this i need to group the vector of vector by the > last column > so my first iteration output should be something like > > [ > [abc 123 Value1] > [def 234 Value1] > [ghi dfgew Value1]] > 2nd iteration should be > [ > [jkl 456 Value5] > [pqr 567 Value5]] > 3rd should be > > [ > [stu 678 value3]] > and so on. > > How would i achieve this in clojure. is there any build in csv parsing > function > > Regards > JP > > > > -- > 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.
