[Haskell-cafe] IO and lazyness.
dav.vire+haskell at gmail.com
Tue Mar 6 18:37:12 EST 2007
On 3/7/07, Daniel McAllansmith <dm.maillists at gmail.com> wrote:
> Your program actually says:
> 1) open file handle
> 2) create a String that will be read _on demand_ from file handle
> 3) close file handle
> 4) print the value which is computed from the String
Thanks for a clear explanation and that's also where I've got lost.
Claus' explanation was helpfull too.
I thought that the order things were done is
1) print the value which is computed from rechf
to do so,
2) open file handle
3) create a String ....
4) close file handle
hence my confusion.
I think I kinda understand now what's going on, but the docs are
definitely lacking here :(
by the way, what would be a safe version of hGetContents ? and why
hGetContents is unsafe ?
More information about the Haskell-Cafe