You might want to look at s/multi-spec which lets you create a variable open spec based on a multimethod, which would in this case be based on key availability.
On Wednesday, September 13, 2017 at 11:54:31 AM UTC-5, Brent Millare wrote: > > I have several maps with different combinations of keys for each map. I > want to process each map but do different work depending on the set of keys > available, basically dispatch on key availability. I thought clojure.spec > might be a good fit for doing the classification step. So for each key, I > could define a spec. Next, I would use clojure.spec.alpha/keys to define a > spec for each set of keys I'd like to match. Finally, I would dispatch like > so: > > (fn [m] > (condp clojure.spec.alpha/valid? m > ::foo-map-spec :do-foo-stuff > ::bar-map-spec :do-bar-stuff)) > > Does this seem reasonable? > > The advantage in my mind is its thorough, explicit, and easy to read. > Possible downsides is performance if it mattered. > > What are the advantages/disadvantages to this approach compared to other > methods? > -- 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.
