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authorJohn MacFarlane <jgm@berkeley.edu>2017-02-04 12:56:30 +0100
committerJohn MacFarlane <jgm@berkeley.edu>2017-02-04 12:56:30 +0100
commit18ab8642692caca2716fd9b5a0e6dbfd3d9cf9cc (patch)
tree05f4e9024093e233c131b3494e71265062ffd94a /test/lhs-test.fragment.html+lhs
parent8418c1a7d7e5312dfddbc011adb257552b2a864b (diff)
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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 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></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>