[Haskell-cafe] what did I do wrong

[Alexander Berntsen]

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On 10/05/14 14:00, Roelof Wobben wrote:
> as I see you changed the main function but I have to make the
> center function work not change the main function.
Your center function takes two tuples, but you give it a tuple of two
tuples.

(foo, bar) (fu, baz) is not the same as ((foo, bar), (fu, baz))

Do you see this? The latter is one value, a tuple of tuples. The
former, which is what your function expects, is two values.

Given the function

add x y = x+y

You are calling it by "add (1, 2)", when you should be calling it
simply by "add 1 2".

Hope this helped.
- -- 
Alexander
alexander at plaimi.net
https://secure.plaimi.net/~alexander
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