Help/Core/NAryOpFunction.html

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  28 <p class="p1"><span class="s1"><b>NAryOpFunction<span class="Apple-tab-span">   </span></b></span><b>represent a n-ary oparation on a function</b></p>
  29 <p class="p2"><br></p>
  30 <p class="p1"><b>superclass: AbstractFunction</b></p>
  31 <p class="p2"><br></p>
  32 <p class="p1">Operating on functions instead of numbers, what results is not a result of the calculation, but a structure that represents that calculation.</p>
  33 <p class="p2"><br></p>
  34 <p class="p3">// example</p>
  35 <p class="p3"><span class="s2">a = 0.8.linexp(0, 1, 40, 20000); </span>// map (0..1) to exponentially to human frequency hearing range</p>
  36 <p class="p4">a = { b }.linexp(0, 1, 40, 20000); <span class="s3">// result is<span class="Apple-converted-space">  </span>a NAryOpFunction</span></p>
  37 <p class="p4">b = 0.1;</p>
  38 <p class="p3"><span class="s2">a.value; </span>// now it is evaluated, and the result is calculated</p>
  39 <p class="p4">b = 0.5;</p>
  40 <p class="p3"><span class="s2">a.value; </span>// again, with a different value.</p>
  41 <p class="p5"><br></p>
  42 <p class="p6"><span class="s2">see also: <a href="BinaryOpFunction.html"><span class="s4">BinaryOpFunction</span></a>, <a href="UnaryOpFunction.html"><span class="s4">UnaryOpFunction</span></a></span></p>
  43 <p class="p6"><span class="s2">related: <a href="../Streams-Patterns-Events/NAryOpStream.html"><span class="s4">NAryOpStream</span></a>, <a href="../Streams-Patterns-Events/Patterns/Pnaryop.html"><span class="s5">Pnaryop</span></a></span></p>
  44 <p class="p2"><br></p>
  45 <p class="p7"><br></p>
  46 <p class="p3">// sound example</p>
  47 <p class="p4">(</p>
  48 <p class="p4"><span class="s6">var</span> a = { 1.0.rand };</p>
  49 <p class="p4"><span class="s6">var</span> b = a.linexp(0, 1, 40, 20000);</p>
  50 <p class="p4">fork {</p>
  51 <p class="p4"><span class="Apple-tab-span">     </span>15.do {</p>
  52 <p class="p4"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>(instrument: <span class="s7">\default</span>, freq: b.value).play;</p>
  53 <p class="p4"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>0.3.wait;</p>
  54 <p class="p4"><span class="Apple-tab-span">     </span>}</p>
  55 <p class="p4">}</p>
  56 <p class="p4">)</p>
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