Filter is lazy: http://clojure.org/api#toc228
So you can implement find-first as (first (filter pred coll)) -M On Feb 10, 2009, at 10:19 AM, Jeff Rose wrote: > > Well, in case someone else needs the same function and it isn't built- > in, here's what I'm using in the meantime. (Based off of the some > function that comes in core...) > > (defn find-first [pred coll] > (when (seq coll) > (if (pred (first coll)) > (first coll) > (recur pred (rest coll))))) > > Cheers, > Jeff > > On Feb 10, 5:18 pm, Jeff Rose <ros...@gmail.com> wrote: >> Hi, >> Is there a built-in function that will return thefirstitemin a >> collection that matches a predicate? (Something equivalent to Ruby's >> Enumerable#find...) Seems pretty basic, but I can'tfindit in the >> docs. >> >> Thanks, >> Jeff > > - Mark Fredrickson mark.m.fredrick...@gmail.com http://www.markmfredrickson.com --~--~---------~--~----~------------~-------~--~----~ 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 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 -~----------~----~----~----~------~----~------~--~---
