[Haskell-beginners] problem with lazy IO

[Dennis Raddle]

Hi Yitz,
I tried "evaluate" before posting my question, and for some reason it didn't
change the behavior. But strict bytestrings worked. I haven't tried Text
yet.
It was a pain putting "map (chr . fromIntegral)" in front of everything to
get
regular strings.

On Wed, Nov 9, 2011 at 10:40 AM, Yitzchak Gale <gale at sefer.org> wrote:

>
> To solve the problem when using readFile from the
> Prelude, you would need to make sure that each
> file is read all the way to the end as you go along.
> One trick sometimes used for that is to use the
> evaluate function from Control.Exception to force
> evaluation of the length of each file:
>
>  b <- readFile s
>  evaluate $ length b
>  ...
>
> That would cause the entire contents of the file
> to be read into memory immediately and the
> file to be closed, like the behavior of readFile
> for strict ByteString and strict Text.
>
> -Yitz
>
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