[Haskell-cafe] Re: How to use "bracket" properly ?

[Heinrich Apfelmus]

zaxis wrote:
> It works very well. However, as i am used to C style so i want convert it
> into
> 
> winSSQ count noRed noBlue = do {
>     let yesRed =  [1..33] \\ noRed;
>     let yesBlue = [1..16] \\ noBlue;
>     bracket (openFile "ssqNum.txt" WriteMode) (hClose) (\hd1 -> pickSSQ
> count yesRed yesBlue hd1);
> } 

You need to put brackets around the declarations in a  let  as well:

    winSSQ count noRed noBlue = do {
        let { yesRed =  [1..33] \\ noRed  };
        let { yesBlue = [1..16] \\ noBlue };
        bracket (openFile "ssqNum.txt" WriteMode) (hClose)
                (\hd1 -> pickSSQ count yesRed yesBlue hd1);
    }


Regards,
apfelmus

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