Or you can get the best of all worlds by combining all three!
data User = User
{ userNext :: IORef (MVar (TVar User)))
, userPrev :: IORef (MVar (TVar User)))
}
On 07/14/10 14:39, Andrew Coppin wrote:
> Serguey Zefirov wrote:
>> Use IORef. ;)
>>
>> PS
>> MVar is better, actually
>
> TVar is better still. ;-)
>
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