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<span class="hidden">CLiki - april</span>
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<div id="content"><div id="content-area"><div id="article-title">april</div><div id="article">A subset of APL (A Programming Language) compiling to Common Lisp.<p>Usage examples follow.<p>Evaluate APL expression:
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<div class="code"><span class="nonparen"><span class="paren1">(<span class="nonparen">april <span class="string">"+/3 4⍴⍳12"</span></span>)</span>
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<span class="comment">;; =>
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</span>#<span class="paren1">(<span class="nonparen">10 26 42</span>)</span>
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</span></div><p>Count from 0:
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<div class="code"><span class="nonparen"><span class="paren1">(<span class="nonparen">april <span class="paren2">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/fun_set.html" class="symbol">set</a> <span class="paren3">(<span class="nonparen"><span class="keyword">:state</span> <span class="keyword">:count-from</span> 0</span>)</span></span>)</span> <span class="string">"⍳9"</span></span>)</span>
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<span class="comment">;; =>
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</span>#<span class="paren1">(<span class="nonparen">0 1 2 3 4 5 6 7 8</span>)</span>
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</span></div><p>Common Lisp I/O:
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<div class="code"><span class="nonparen"><span class="paren1">(<span class="nonparen">april <span class="paren2">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/fun_set.html" class="symbol">set</a> <span class="paren3">(<span class="nonparen"><span class="keyword">:state</span> <span class="keyword">:in</span> <span class="paren4">(<span class="nonparen"><span class="paren5">(<span class="nonparen">a 1</span>)</span> <span class="paren5">(<span class="nonparen">b 2</span>)</span></span>)</span>
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<span class="keyword">:out</span> <span class="paren4">(<span class="nonparen">a c</span>)</span></span>)</span></span>)</span>
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<span class="string">"c←a+b×11"</span></span>)</span>
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<span class="comment">;; =>
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</span>1
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23
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</span></div><p>Symbols with dashes need to be converted into camelCase in APL:
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<div class="code"><span class="nonparen"><span class="paren1">(<span class="nonparen">april <span class="paren2">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/fun_set.html" class="symbol">set</a> <span class="paren3">(<span class="nonparen"><span class="keyword">:state</span> <span class="keyword">:in</span> <span class="paren4">(<span class="nonparen"><span class="paren5">(<span class="nonparen">my-var 2</span>)</span>
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<span class="paren5">(<span class="nonparen">other-var 5</span>)</span></span>)</span></span>)</span></span>)</span>
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<span class="string">"myVar×otherVar+5"</span></span>)</span>
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<span class="comment">;; =>
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</span>20
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</span></div><p>Uses <a href="array-operations.html" class="internal">array-operations</a> underneath.<p>Homepage: <a href="https://github.com/phantomics/april">GitHub</a><p>License: <a href="Apache 2.html" class="category">Apache 2</a><p><hr>
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Topics: <a href="linear algebra.html" class="category">linear algebra</a>, <a href="matrix.html" class="category">matrix</a>, <a href="programming language.html" class="category">programming language</a></div></div>
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