<div dir="ltr">There was the long forgotten  generalised List Comprehensions. Is it still working in the last versions?<div><br></div><div><code class="" style="color:rgb(0,0,0)">-XTransformListComp</code></div><div><code class="" style="color:rgb(0,0,0)"><br></code></div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-05-21 13:55 GMT+02:00 Oliver Charles <span dir="ltr"><<a href="mailto:ollie@ocharles.org.uk" target="_blank">ollie@ocharles.org.uk</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">The <a href="https://hackage.haskell.org/package/tables" target="_blank">https://hackage.haskell.org/package/tables</a> library is one way to get a somewhat relational view of in-memory data.<div><br></div><div>- Ollie</div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Thu, May 21, 2015 at 10:31 AM, Tom Ellis <span dir="ltr"><<a href="mailto:tom-lists-haskell-cafe-2013@jaguarpaw.co.uk" target="_blank">tom-lists-haskell-cafe-2013@jaguarpaw.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>On Tue, May 19, 2015 at 11:35:31AM -0700, KC wrote:<br>
> I'm reading #OutOfTheTarPit does ghc have a relational model built in for<br>
> state?<br>
><br>
> "Out of the Tar Pit" talks about FRP - Functional Relational Programming<br>
<br>
</span>I guess you're looking for an "in memory" relational implementation.<br>
Opaleye and Relational Record, that Ben Ford mentioned, are for building<br>
queries for external SQL databases.<br>
<br>
For some time now I've been thinking about implementing such an "in memory"<br>
database with the same API as Opaleye, and I know Edward Kmett has thought<br>
about efficient ways to implement such a thing using the techniques of<br>
"discrimination" that he is fond of.  I for one don't have anything to show<br>
yet, but I will certainly announce it here if and when I do.<br>
<br>
Tom<br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">Alberto.</div>
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