I know that there's a lot of questions about converting string to float/number/decimal... but my case is quite different cause I need to convert the string number (representing a dollar value) but I must keep the cents in this conversion, here is my case.
I receive this values "96,26" "1.296,26" And I expect to convert to this follow: 96.26 1296.26
If I try to use clojure.edn it escape cents
(edn/read-string "1.296,26")
=> 1.296
(edn/read-string "96,26")
=> 96
If I try to use another approach like bugdec I get NumberFormatException
I know that we can do some string replace but it looks like a big work around, like this:
(-> "1.296,87"
(clojure.string/replace #"\." "")
(clojure.string/replace #"," ".")
(edn/read-string))
what you can do, is to use java's formatting facilities:
(defn read-num [s]
(let [format (java.text.NumberFormat/getNumberInstance java.util.Locale/GERMANY)]
(.parse format s)))
user> (read-num "1.296,26")
;;=> 1296.26
user> (read-num "96,26")
;;=> 96.26
To be really picky, the double precision floating point representation of 96.26 may not be exactly 96.26. To obtain an exact representation of the value 96.26, one could maybe convert it to a ratio using a function such as
(defn fraction-of-100 [x] (/ (Math/round (* 100 x)) 100)).Try for example
(- 96.26 (- (+ 96.26 100000) 100000))in the REPL.See
DecimalFormatandDecimalFormatSymbolsif you need exact values.