> is an arrow that takes a pair of values and combines them to return a single value:</p
><preclass="sourceCode haskell"
><code
>unsplit :: (<spanclass="dt"
>Arrow</span
> a) => (b -> c -> d) -> a (b, c) d<br
/>unsplit <spanclass="fu"
>=</span
> arr <spanclass="fu"
>.</span
> <spanclass="fu"
>uncurry</span
> <br
/> <spanclass="co"
>-- arr (\op (x,y) -> x `op` y) </span
><br
/></code
></pre
><p
><code
>(***)</code
> combines two arrows into a new arrow by running the two arrows on a pair of values (one arrow on the first item of the pair and one arrow on the second item of the pair).</p
