How do I make the power function, doubles and [..] working together in frege? -

while

map (\x -> x * x) [0..9] 

is working fine (also list comprehension), cannot do

map (** 2) [0..9] 

since power operator requires doubles , .. operator not allow them.

is there mapping can use?

the reason double not instance of enum.

there 2 possibilities:

1. make double instance of enum.
2. use function converts int values numeric type need:

for example:

(map (** 2) . map fromint) [0..9] 

or, if prefer:

map ((** 2) . fromint) [0..9]