<h1 id="lhs-test"
>lhs test</h1
><p
><code
  >unsplit</code
  > is an arrow that takes a pair of values and combines them to return a single value:</p
><pre class="sourceCode haskell"
><code
  >&gt; <span class="ot"
    >unsplit </span
    ><span class="ot"
    >::</span
    > (<span class="dt"
    >Arrow</span
    > a) <span class="ot"
    >=&gt;</span
    > (b <span class="ot"
    >-&gt;</span
    > c <span class="ot"
    >-&gt;</span
    > d) <span class="ot"
    >-&gt;</span
    > a (b, c) d<br
     />&gt; unsplit <span class="fu"
    >=</span
    > arr <span class="fu"
    >.</span
    > <span class="fu"
    >uncurry</span
    >       <br
     />&gt;           <span class="co"
    >-- arr (\op (x,y) -&gt; 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
><pre
><code
  >f *** g = first f &gt;&gt;&gt; second g
</code
  ></pre
><p
>Block quote:</p
><blockquote
><p
  >foo bar</p
  ></blockquote
>