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<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 literatehaskell"
><code
  ><span class="Char Special"
    >&gt;</span
    ><span class="Function FunctionDefinition"
    > unsplit ::</span
    ><span class="Normal NormalText"
    > (Arrow a) =&gt; (b -&gt; c -&gt; d) -&gt; a (b, c) d</span
    ><br
     /><span class="Char Special"
    >&gt;</span
    ><span class="Normal NormalText"
    > unsplit = arr . </span
    ><span class="Function"
    >uncurry</span
    ><span class="Normal NormalText"
    >       </span
    ><br
     /><span class="Char Special"
    >&gt;</span
    ><span class="Normal NormalText"
    >           </span
    ><span class="Comment"
    >-- 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
>