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Boa tarde,

aqui estou eu para chatear mais uma vez  🙂

Queria definir a função intercala :: a -> [a] -> [a] que intercala um dado elemento entre cada dois elementos da lista. Por exemplo, intercala ‘,‘ "abc" == "a,b,c".

eu fiz o seguinte:

intercala :: a -> [a] -> [a]
intercala _ [x] = x
intercala y (x:xs) = x:y:(intercala y xs)

O que estou aqui a fazer de mal?  🙂

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