[Haskell-cafe] Re: Function to cast types

[Henning Thielemann]

On Sun, 22 Mar 2009, Achim Schneider wrote:

> Anonymous Anonymous <temp.public at gmail.com> wrote:
>
>> Hello,
>>
>> I'm new to haskell, I'm wondering how can you write a function that
>> will do the following:
>>
>> fromIntToString :: Int -> String
>>
>> this is a cast function to cast an Int to a String. I know such
>> function exist, however let's assume it didn't exist. How would I
>> write such function?
>>
> I have no Idea, but this one works:
>
> intOfChar c | c >= '0' && c <= '9' = fromEnum c - fromEnum '0'
> intOfChar _ = undefined

this is 'digitToInt' from Char module