It depends where you want the output to go.
You can definitely add an area to your template which you can list
error / debug messages.
Alternatively you can do a `liftIO $ print x` from the handler
function to print some output to the console (you can also liftIO
other operations such as file io so you can append to a log file).
there is also the onRequest function in the Yesod typeclass which gets
run once per request where you can do some logging/output.
-barkmadley
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2010/11/29 Simon Michael
This might be slightly related.. in PHP code I sometimes dump something into the output stream "right now". This can be quite handy for debugging, you can tell things from the position on the page etc. Can this be done from a yesod request handler ?
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