Excellent stuff, guys. Thanks for the help. I just got 'Joy of Clojure' and 'Clojure Programming' in the mail yesterday so hopefully I'll be up to speed quickly.
On Wednesday, January 9, 2013 1:37:45 PM UTC-5, Jim foo.bar wrote: > > On 09/01/13 18:20, Jim - FooBar(); wrote: > > Alex's solution is also quite idiomatic and it takes care of the > transient/peristent conversion as well...It seems slightly heavier though > cos you're building an intermediate vector. > > > CORRECTION: you'd be building MANY intermediate vectors...as many as your > keys in the old-map... > > In addition, as a bonus, in case your old-map is truly massive you can > partition it and reduce/fold it in parallel really easily with > reducers...see this for more: > http://www.thebusby.com/2012/07/tips-tricks-with-clojure-reducers.html > > > So, > > normal map -> 'reduce-kv' or 'into'/'for' > big map -> 'reduce-kv' with transients > massive map -> 'fold' (reducers) > > Hope that covers everything :) > > Jim > -- 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
