I use cond-> quite a lot but I find myself often wanting a version that uses 
predicate functions rather than expressions which would seem more “threaded”. 
Am I just missing a better way to write these things?


For example:


(cond-> accounts

  (empty? accounts) (conj “stuff”))


That just screams for something like:


(condp-> accounts

  empty? (conj “stuff”))


Then you could thread the predicates:


(condp-> a

  p1 (f1 args)

  p2 (f2 args))


which would be:


(let [x (if (p1 a) (f1 a args) a)]

  (if (p2 x) (f2 x args) x))


Suggestions?






Sean Corfield -- (904) 302-SEAN
An Architect's View -- http://corfield.org
World Singles, LLC - http://worldsingles.com

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