Re: [Haskell-cafe] Is it safe to use unsafePerformIO here?

Am Dienstag 15 September 2009 22:17:00 schrieb Cristiano Paris:

On Tue, Sep 15, 2009 at 10:12 PM, Ross Mellgren wrote:

...

Wouldn't seq b only force (at minimum) the first character of the file?

I think it force the evaluation of the "Cons" in the String but not the characters therein.

It evaluates the String far enough to know whether it's "" or (_:_), that is, to weak head normal form. It doesn't look at any character, but it forces at least one character to be read from the file.

Cristiano