Just realized I used &quot;f&quot; twice, make the outer one something else.<br><br><div class="gmail_quote">On Tue, Oct 4, 2011 at 5:27 AM, Sebastien Zany <span dir="ltr">&lt;<a href="mailto:sebastien@chaoticresearch.com" target="_blank">sebastien@chaoticresearch.com</a>&gt;</span> wrote:<br>


<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">What would be the idiomatic way to write a function which expands to the following?<div><br></div><div>f n m = do {</div>


<div>x1 &lt;- m;</div><div>guard (f [x1]);</div><div>x2 &lt;- m;</div><div>guard (f [x1, x2]);</div><div>

.</div><div>.</div><div>.</div><div>xn &lt;- m;</div><div>guard (f [x1,x2,...,xn]);</div><div>}</div><div><br></div><div>What I&#39;m trying to do is generate a list of lists of length n with some property (checked by f) efficiently.</div>




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