intercalate (a:b:_) (c:d:_) = [a,c,b,d]

On Thu, Aug 30, 2012 at 8:52 AM, Ezequiel Hernan Di Giorgi <hernan.digiorgi@gmail.com> wrote:
Hallo liebe Leute. Hola gente. I'm starting with Haskell and i have some problems:

intercalate :: [t] -> [t] -> [t]
intercalate [a,b] [c,d] = [a,c,b,d]
intercalate (_) (_) = error "JOJO u cant do this"

Are there any form to restrict the parmaters that only allow to call the function intercalate with two arrays of two elements, in compilation time? Cause i cant write intercalete :: [t,t] -> [t,t]->[t,t,t,t]. 

Sorry for my bad english. I'm Argentinean.

Thanks!

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