doseq is a macro that accepts comprehension clauses like "for", so doseq is a straight translation of for that is eager (but still uses seqs internally) and swallows its body's results.
run! is like more like (doall (map f xs)), except it swallows results and uses "reduce" for speed and efficiency (no seq allocations). In general, if I am side-effecting at the end of a ->> threading macro pipeline, I use run!. If I care about speed I use run! Otherwise I use doseq because it looks and feels more "statement-y" to me. On Saturday, December 24, 2016 at 12:16:50 PM UTC-6, Shantanu Kumar wrote: > > I'm curious about `clojure.core/run!` too, but my question is whether it > is meant to be a `reduce` variant of `clojure.core/doseq` or it has some > other purpose. > > Shantanu > > On Saturday, 24 December 2016 21:37:11 UTC+5:30, James Reeves wrote: >> >> My understanding is that the convention used in clojure.core is to put an >> exclamation mark onto the end of any function unsafe to run in a >> transaction. >> >> Does the reasoning differ for "run!" or is it assumed that the function >> passed to "run!" will not usually be idempotent? >> >> - James >> > -- 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.
