I'm learning clojure and have a very basic question: given that clojure has type inference, how can you tell what class was inferred?
For instance, these would each result in different data types:
(2)
(/ 2 3)
(/ 2.0 3)
Is there some kind of class function that will return the data type? Also, is there a normal way of casting something to be a specific type? So in the second example above, what would I do if I wanted the result to be float?
There is a type function in the clojure.core library.
user> (type 2)
java.lang.Integer
user> (type (/ 2 3))
clojure.lang.Ratio
user> (type (/ 2.0 3))
java.lang.Double
If you want to convert a given number into a float then use float.
user> (float 10)
10.0
Similarly you may not need to cast because the following works:
user> (Double/toString (/ 2 3))
"0.6666666666666667"
However, this does too:
user> (str (/ 2 3))
"0.6666666666666667"