<div dir="ltr">On Thu, Dec 22, 2011 at 14:44, Dennis Raddle <span dir="ltr"><<a href="mailto:dennis.raddle@gmail.com">dennis.raddle@gmail.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
test :: Int -> Either String String<br>test x = do<br> y <- case M.lookup x testMap of<br> Nothing -> throwError "not in map"<br> Just z -> return z<br> return y<br></blockquote><div>
<br></div><div>> test x = maybe (Left "not in map") Right $ M.lookup x testMap</div></div><div><br></div>-- <br>brandon s allbery <a href="mailto:allbery.b@gmail.com" target="_blank">allbery.b@gmail.com</a><br>
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