Thanks so much for your answers.
OK. So from the solutions above I understand that Clojure does not
have C#'s equivalent of Math.round(7.127298, 2), and requires either
using some custom method or Java's rounding?
I think I'll rather go with the Java-interop approach.
On Mar 23, 11:13 pm, Joost <jo...@zeekat.nl> wrote:
> On Mar 23, 8:07 pm, Meikel Brandmeyer <m...@kotka.de> wrote:
>
>
>
> > Hi,
>
> > a bit naive, but it seems to work…
>
> > user=> (defn round
> > [x & {p :precision}]
> > (if p
> > (let [scale (Math/pow 10 p)]
> > (-> x (* scale) Math/round (/ scale)))
> > (Math/round x)))
> > #'user/round
> > user=> (round 78.37898794)
> > 78
> > user=> (round 78.37898794 :precision 3)
> > 78.379
>
> > There are probably thousand reasons not to do that…
>
> Most important one being that it won't be reliable. Floats are
> fundamentally not compatible with decimal rounding. You'll have to
> switch to some other representation like (big) decimals, fixed point
> or strings to get it.
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