It works like a charm, thanks a lot Jonathan! Adam On Jan 29, 2008, at 10:26 PM, Jonathan Cast wrote: On 29 Jan 2008, at 9:44 PM, Adam Smyczek wrote: Hi, My application has to manage a data set. I assume the state monad is designed for this. The state changes in functions that: a. perform IO actions and b. return execution status and execution trace

Hi, My application has to manage a data set. I assume the state monad is designed for this. The state changes in functions that: a. perform IO actions and b. return execution status and execution trace (right now I'm using WriteT for this). Is the best solution: 1. to build a monad stack (for example State -> Writer -> IO) or 2. to use IORef for the data set or 3. something else?

Hello. maybe you need to wait that Spry.Data loads xml file. <script language="javascript"> var dsrows = new Spry.Data.XMLDataSet("tablerows.xml", "records/record"); var dscols = new Spry.Data.XMLDataSet("tablecols.xml", "fields/field"); var dsrowsObserver=new Object; dsrowsObserver['loaded']=false; var dscolsObserver=new Object; dscolsObserver['loaded']=false; dsrowsObserver