Thanks Cedric, I am constantly writing code and then finding something in the core library whivh already does what I need :).
http://clojuredocs.org/clojure_core/1.2.0/clojure.walk/keywordize-keys was the latest gem. On 5 Jul 2013 22:51, "Cedric Greevey" <cgree...@gmail.com> wrote: > Even without reaching for libraries outside clojure.core, there's > > (update-in m [:key-of-interest] #(if (condition? %) (transformation %) %)) > > and the ability to convert that into a function, e.g. > > (defn conditional-update-in [m condition? transformation k] > (update-in m [k] #(if (condition? %) (transformation %) %))) > > and then, if you have many keys that should undergo the same > transformation under the same condition, > > (reduce (partial conditional-update-in m condition? transformation) > [keys...]), and its encapsulation, > > (defn conditional-update-multi [m condition? transformation ks] > (reduce (partial conditional-update-in m condition? transformation) ks)) > > > > > On Fri, Jul 5, 2013 at 5:31 PM, Ben Wolfson <wolf...@gmail.com> wrote: > >> You could use clojure.algo.generic.functor.fmap: (fmap #(if (pred? %) >> replacement-value %) your-map). >> >> >> On Fri, Jul 5, 2013 at 2:08 PM, John Walker <jouiswal...@gmail.com>wrote: >> >>> I had to do something similar, and used >>> clojure.walk.<http://clojuredocs.org/clojure_core/clojure.walk/walk> >>> >>> On Friday, July 5, 2013 8:59:54 PM UTC, Colin Yates wrote: >>>> >>>> Hi all, >>>> >>>> I think this is one of those questions which has quite a few answers, >>>> but given a map, how do I replace the values by applying a function to >>>> those values, but only if they meet a condition? >>>> >>>> I understand the building blocks of (map..), (filter..), (assoc-in..) >>>> and (filter..) and I can see how something could work using those pieces >>>> but is would be pretty verbose. I am sure there is probably a much more >>>> simple way using a more abstract function. >>>> >>>> The actual use case is I have a list of maps as returned from the >>>> clojure.java.jdbc framework and they contain timestamps. I want to replace >>>> all the timestamps with (for example) to a Joda LocalDate using the >>>> excellent clj-time library. >>>> >>>> Any pointers? >>>> >>>> Thanks! >>>> >>>> Col >>>> >>> -- >>> -- >>> 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/groups/opt_out. >>> >>> >>> >> >> >> >> -- >> Ben Wolfson >> "Human kind has used its intelligence to vary the flavour of drinks, >> which may be sweet, aromatic, fermented or spirit-based. ... Family and >> social life also offer numerous other occasions to consume drinks for >> pleasure." [Larousse, "Drink" entry] >> >> -- >> -- >> 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/groups/opt_out. >> >> >> > > -- > -- > 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 a topic in the > Google Groups "Clojure" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/clojure/Wqu-VBR5bSk/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- 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/groups/opt_out.
