On Mon, 2008-12-29 at 14:19 -0500, Ross Mellgren wrote:
The problem is that you're trying to take a STMatrix from some other
ST computation and freeze it in a new ST computation. The isolation
between separate computations is done via the rank-2 type variable s
in all those ST functions.
On Dec 29, 2008, at 3:43 PM, Andre Nathan wrote:
On Mon, 2008-12-29 at 14:19 -0500, Ross Mellgren wrote:
The problem is that you're trying to take a STMatrix from some other
ST computation and freeze it in a new ST computation. The isolation
between separate computations is done via the rank-2
Hello Andre,
Monday, December 22, 2008, 4:44:34 AM, you wrote:
Is there any difference between using freeze/thaw from Data.Array.MArray
versus freezeSTArray/thawSTArray from GHC.Arr?
portability, at least
--
Best regards,
Bulatmailto:bulat.zigans...@gmail.com
Hello,
I'm trying to write a function that would take an STArray and and
shuffle its elements. I'm having trouble with the ST monad, though, and
couldn't find out how fix this issue.
The problem happens when I use runST to extract the shuffled array from
the ST monad. I'm getting the following
The problem is that you are trying to return a mutable array out of an
ST computation. This lets the mutability of the computation escape.
That's what the s type variable is for; without it, runST is just
unsafePerformIO.
To solve your problem, you need to eliminate any references to the
state
On Sun, 2008-12-21 at 16:47 -0800, Ryan Ingram wrote:
The problem is that you are trying to return a mutable array out of an
ST computation. This lets the mutability of the computation escape.
That's what the s type variable is for; without it, runST is just
unsafePerformIO.
Thanks!
If
