This doesn't seem to work for non-terminating decimals like 1/3: (defn round [s n] > (.setScale (bigdec n) s java.math.RoundingMode/HALF_EVEN)) > #'user/round > user=> (round 3 (/ 1 3)) > ArithmeticException Non-terminating decimal expansion; no exact > representable decimal result. java.math.BigDecimal.divide > (BigDecimal.java:1603)
Is there a way of sending the scale to the bigdec function instead of setting it afterwards? It doesn't seem so from the docs.. // Pascal. On Wednesday, 23 March 2011 20:59:18 UTC+1, Brenton wrote: > > You may also consider using java interop here. > > (defn round [s n] > (.setScale (bigdec n) s java.math.RoundingMode/HALF_EVEN)) > > => (round 3 78.37898794) > => 78.379 > > see > > http://download.oracle.com/javase/1.5.0/docs/api/java/math/BigDecimal.html > > Brenton > > On Mar 23, 11:08 am, JDuPreez <jacques...@gmail.com> wrote: > > I'm trying to round a decimal number like 78.37898794 to say 78.379, > > without converting it to a string. I've been struggling to get this > > right and to get info on it. The closest that I've found is to use: > > format "%.3f". But format converts the number to a string. Not exactly > > what I'm trying to do. > > > > How can I do this in Clojure, or where is info on how to do it? Thanks > > for your help. -- 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
