(map m [:a :b]) is a nice trick, we use it a lot in cascalog queries: (map ?account [:id :updated-at :created-at] :> ?id ?updated-at ?created-at)
Where juxt would require more ceremony because of the need for serialization ((mapfn [m] ((juxt :id :updated-at :created-at) m)) ?account :> ?id ?updated-at ?created-at) On Friday, October 23, 2015 at 7:42:24 AM UTC-7, Colin Yates wrote: > > Kicking myself I didn’t grok (map m [:a :b])! > > On 23 Oct 2015, at 15:32, Aaron Cohen <aa...@assonance.org <javascript:>> > wrote: > > I think you might find the following blog post helpful: > http://blog.jayfields.com/2011/01/clojure-select-keys-select-values-and.html > > What you are asking for is basically (clojure.string/join (select-values > my-map vals)) where select-values is defined in several ways in the linked > blog post. > > For code golf points, the briefest example from the blog that would work > for your purposes might be: > > (defn select-values [m ks] (map m ks)) > > So: > > user=> (def my-map { :name "roelof", :city "big-secret" }) > > user=> (clojure.string/join ", " (map my-map [:name :city])) > "roelof, big-secret" > > > On Fri, Oct 23, 2015 at 7:49 AM, r/ Wobben <wobb...@gmail.com > <javascript:>> wrote: > >> Hello, >> >> As a challenge I need to convert a map structure to a csv structure. >> >> So ( { :name "roelof", :city secret }) need to be converted to roelof, >> secret. >> >> I think I can use something like (map clojure.string/join ..) for it but >> it seems I have to make a function out of the :name roelof part to get >> roelof back. >> >> I could use get for then I do not know how to call 1 records of the >> whole map. >> >> Can someone explain in simple English how I can solve this one ? >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clo...@googlegroups.com >> <javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> 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+u...@googlegroups.com <javascript:>. >> 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 clo...@googlegroups.com <javascript:> > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+u...@googlegroups.com <javascript:> > 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+u...@googlegroups.com <javascript:>. > 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.
