Oh yeah, "or"! Perfect! On Wed, May 1, 2013 at 12:46 PM, Cedric Greevey <cgree...@gmail.com> wrote: > What about > > (or > (validate-data-1 data-1) > (validate-data-2 data-2) > (validate-data-3 data-3)) > > ? > > Or > > (some identity > (map #(%1 %2) > [validate-data-1 validate-data-2 validate-data-3] > [data-1 data-2 data-3])) > > (though that might realize elements past the first non-nil one if vectors > produce chunked seqs). > > > > On Wed, May 1, 2013 at 12:13 PM, Steven Degutis <sbdegu...@gmail.com> wrote: >> >> I've found myself writing a validator function. >> >> It has a list of internal validator functions, and should return the first >> one that evaluates to non-nil, without evaluating the rest. >> >> Here's the code I've come up with: >> >> (defn validate-something [data-1 data-2 data-3] >> (some #(%) >> [#(validate-data-1 data-1) >> #(validate-data-2 data-2) >> #(validate-data-3 data-3)])) >> >> But this code just feels ugly and I feel like it could be more idiomatic. >> >> For one thing, it shares something in common with cond, since it should >> return the first one that returns non-nil. But each cond clause takes two >> params, the test and the result, whereas this is just one and the same. So I >> don't know how I would use cond with it. >> >> Alternatively, that property could be implemented by the lazy-evaluation >> of map. My first impulse was to do (find-first (map apply [f1 f2 f3])) but >> first of all I'd have to write find-first (or use something in contrib), and >> second of all apply seems to expect args and gave me an error. But maybe >> that last part was just me being overtired. >> >> Does anyone here have a more idiomatic or elegant solution than the (some) >> one above? >> >> -Steven >> >> -- >> -- >> 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 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. > >
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