I'm not a huge fan of (.:), but you insist on adding it, please generalize it to fmap.fmap.<div><br></div><div>(.:) :: (Functor f, Functor g) => (a -> b) -> f (g a) -> f (g b)</div><div><br></div><div>This subsumes the other use case.</div>
<div><br></div><div><div>-Edward</div><div><br></div><div><br><div class="gmail_quote">On Tue, Aug 14, 2012 at 5:32 AM, David McGillicuddy <span dir="ltr"><<a href="mailto:dmcgill9071@gmail.com" target="_blank">dmcgill9071@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">What about (.:)*? Just looking at Hayoo quickly, at least half a dozen libraries seem to have defined it and it's a permanent feature on lambdabot.<div>
<br></div><div>*(.:) :: (c -> d) -> (a -> b -> c) -> a -> b -> d</div>
<div> (.:) = (.) (.) (.)</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>David</div></font></span><div class="HOEnZb"><div class="h5"><div><br><div class="gmail_quote">On Tue, Aug 14, 2012 at 7:54 AM, Simon Hengel <span dir="ltr"><<a href="mailto:sol@typeful.net" target="_blank">sol@typeful.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>On Mon, Aug 13, 2012 at 10:31:19PM -0400, Tom Murphy wrote:<br>
> It would be great to have maybeRead in base in time for the next Haskell<br>
> Platform release. There's been talk about including it several times, but<br>
> it's remained as a utility function in other libraries (Network.CGI, for<br>
> example, if I'm remembering right).<br>
<br>
</div></div>It's in base-4.6.0.0, but it's called readMaybe (personally, I don't<br>
like that name, but I guess it's for consistency with readEither).<br>
<br>
Cheers,<br>
Simon<br>
<br>
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