Hi,
If I define the follwoing functions:
car (x:_) = x
car [] = []
cdr (_:xs) = xs
cdr [] = []
and try to apply them to some list, such as
car [1,2,3]
I get this odd error:
<interactive>:1:9:
No instance for (Num [a])
arising from the literal `3' at <interactive>:1:9
Possible fix: add an instance declaration for (Num [a])
In the expression: 3
In the first argument of `car', namely `[1, 2, 3]'
In the expression: car [1, 2, 3]
What am I doing wrong this time? :-P
Thanks
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