Hey
Does the part about numbers: http://clojure.org/data_structures clear
it up for you?
>From (source +) you should see that (+ 0.1 0.1M ...) is matched to
(. clojure.lang.Numbers (add x y)))
; (. clojure.lang.Numbers (add 0.1 0.1M)) =>0.2
and that (+ 0.1M 0.1M ...) is (. clojure.lang.Number
I was testing some of the code in Miclael Fogus & Chris Houser's The Joy of
Clojure and found this:
Clojure 1.4.0
user=> (let [a (+ 0.1 0.1M 0.1M 0.1M 0.1M 0.1M 0.1M 0.1M 0.1M 0.1M)]
(println (class a))
a)
java.lang.Double
0.
user=> (let [b (+ 0.1M 0.1M 0.1M 0.1M 0.1M 0.1M 0.
