as-> only binds the specified expression rather than each result in step and only works from within ->
Timothy Baldridge writes: > That was added to clojure.core in 1.6 and is known as "as->" > https://clojuredocs.org/clojure.core/as-%3E > > > > On Sat, Nov 15, 2014 at 6:55 AM, Krzysiek Herod <krzysiek.he...@gmail.com> > wrote: > >> Guys, what do you think about new thread macro (I would call it thread-any >> and represent it as "%>"), that would require you to always specify the >> position of the argument you want to pass to the function? >> >> This code: >> >> (defn csv-line->sql-line [table, line] >> (-> line >> (str " ") >> (str/split separator) >> (#(map csv-field->sql-field %)) >> (#(str/join ", " %)) >> (str/replace strings-wrapper "\"") >> (#(str "INSERT INTO ", table, " VALUES(" % ");")))) >> >> would become: >> >> (defn csv-line->sql-line [table, line] >> (%> line >> (str % " ") >> (str/split % separator) >> (map csv-field->sql-field %) >> (str/join ", " %) >> (str/replace strings-wrapper % "\"") >> (str "INSERT INTO ", table, " VALUES(" % ");"))) >> >> Reasoning: >> - there are functions that are "thread-first fiendly", and other that are >> "thread-last friendly", by using thread-in you don't have to redefine >> functions only to change the order of the attributes >> - I find it easier to follow execution chain if the argument is passed >> explicitely >> >> PS. I'm a clojure newbie, still in the process of learning basics. For >> example I'm not sure how to implement such macro yet, so if you find >> something obviously wrong, or missing in my suggestion, please let me know. >> I'll be super happy to read about alternative solutions to achieve similar >> goal. >> >> -- >> 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. >> > > > > -- > “One of the main causes of the fall of the Roman Empire was that–lacking > zero–they had no way to indicate successful termination of their C > programs.” > (Robert Firth) -- -- 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.
