Clojurians Log v2
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Santiago 2019-12-31T10:49:35.004600Z
I tried to round a number yesterday and it was very frustrating, ended up using a string and then reconverting. How do you do it?
zane 2020-01-02T00:05:22.010600Z
Forgive me if you're already aware, but depending on your needs you might not need to reach for a library like fastmath. Math/round is from Java's standard library works for many use cases.
$ clj
Clojure 1.10.1
user=> (Math/round 0.7)
1
genmeblog 2019-12-31T11:51:53.005500Z
I use Apache Commons Math for that, but you can adapt the code from their strategies.
genmeblog 2019-12-31T11:51:54.005700Z
genmeblog 2019-12-31T11:58:15.006200Z
and here is the other strategy: https://commons.apache.org/proper/commons-math/javadocs/api-3.6.1/src-html/org/apache/commons/math3/util/Precision.html#line.426
chrisn 2019-12-31T14:38:12.007500Z
Well, @slack.jcpsantiago or you can use the fastmath clojure library where @tsulej has already carefully gone through a bunch of libraries and curated the fastest paths out of them for various forms of arithmetic: https://github.com/generateme/fastmath
genmeblog 2019-12-31T15:31:52.009600Z
haha, yes, fastmath exposes what I've mentioned above as round, rint, and approx
Santiago 2019-12-31T16:16:25.010100Z
Nice thank you both, I'll check it out