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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica"><font class="Apple-style-span" face="'Times New Roman'" size="4"><span class="Apple-style-span" style="font-size: 16px;">What's an elegant definition of a Haskell function that takes two strings and returns "Nothing" in case the first string isn't a substring of the first, or "Just i", where i is the index number of the position within the first string where the second string begins?</span></font></p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica"><font class="Apple-style-span" face="'Times New Roman'" size="4"><span class="Apple-style-span" style="font-size: 16px;"><br></span></font></p> <br /><hr />Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. <a href='http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_1' target='_new'>Learn more.</a></body>
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