<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>> <span class="ot">unsplit </span><span class="ot">::</span> (<span class="dt">Arrow</span> a) <span class="ot">=></span> (b <span class="ot">-></span> c <span class="ot">-></span> d) <span class="ot">-></span> a (b, c) d<br/>> unsplit <span class="fu">=</span> arr <span class="fu">.</span> <span class="fu">uncurry</span> <br/>> <span class="co">-- arr (\op (x,y) -> x `op` y) </span></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 >>> second g</code></pre> <p>Block quote:</p> <blockquote> <p>foo bar</p> </blockquote>