Help/Collections/Association.html

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  27 <p class="p1"><span class="s1"><b>Association<span class="Apple-tab-span">      </span><span class="Apple-tab-span">    </span></b></span><span class="Apple-tab-span"> </span><span class="Apple-tab-span">    </span><b>relate two objects<span class="Apple-converted-space"> </span></b></p>
  28 <p class="p2"><br></p>
  29 <p class="p1"><b>Inherits from: </b><a href="../Core/Object.html"><span class="s2"><b>Object</b></span></a><b> : </b><a href="../Math/Magnitude.html"><span class="s3"><b>Magnitude</b></span></a></p>
  30 <p class="p2"><br></p>
  31 <p class="p1">Associates a key with a value.<span class="Apple-converted-space"> </span></p>
  32 <p class="p1">Associations can be created via the -&gt; operator which is defined in class <a href="../Core/Object.html"><span class="s3">Object</span></a>.</p>
  33 <p class="p2"><br></p>
  34 <p class="p1">Associations are used internally in <a href="Dictionary.html"><span class="s3">Dictionary</span></a></p>
  35 <p class="p2"><br></p>
  36 <p class="p3">(</p>
  37 <p class="p3">x = <span class="s4">'name'</span> -&gt; 100;</p>
  38 <p class="p3">x.postln;</p>
  39 <p class="p3">)</p>
  40 <p class="p2"><br></p>
  41 <p class="p4"><b>Accessing</b></p>
  42 <p class="p2"><br></p>
  43 <p class="p1"><b>&lt;&gt;key</b></p>
  44 <p class="p2"><br></p>
  45 <p class="p1">the key object.</p>
  46 <p class="p2"><br></p>
  47 <p class="p1"><b>&lt;&gt;value</b></p>
  48 <p class="p2"><br></p>
  49 <p class="p1">the value object.</p>
  50 <p class="p2"><br></p>
  51 <p class="p2"><br></p>
  52 <p class="p4"><b>Creation</b></p>
  53 <p class="p2"><br></p>
  54 <p class="p1"><b>*new(key, value)</b></p>
  55 <p class="p2"><br></p>
  56 <p class="p1">Create an Association between two objects.</p>
  57 <p class="p1"><b>key</b> - any object.<span class="Apple-converted-space"> </span></p>
  58 <p class="p1"><b>value</b> - any object.</p>
  59 <p class="p2"><br></p>
  60 <p class="p2"><br></p>
  61 <p class="p4"><b>Testing</b></p>
  62 <p class="p2"><br></p>
  63 <p class="p1"><b>== anAssociation</b></p>
  64 <p class="p2"><br></p>
  65 <p class="p1">Compare the keys of two Associations.</p>
  66 <p class="p2"><br></p>
  67 <p class="p1"><b>&lt; anAssociation</b></p>
  68 <p class="p2"><br></p>
  69 <p class="p1">Compare the keys of two Associations.</p>
  70 <p class="p2"><br></p>
  71 <p class="p1"><b>hash</b></p>
  72 <p class="p2"><br></p>
  73 <p class="p1">Compute the hash value of the Association.</p>
  74 <p class="p2"><br></p>
  75 <p class="p2"><br></p>
  76 <p class="p2"><br></p>
  77 <p class="p4"><b>Writing to streams</b></p>
  78 <p class="p2"><br></p>
  79 <p class="p1"><b>printOn(stream)</b></p>
  80 <p class="p2"><br></p>
  81 <p class="p1">Write a string representation to the stream.</p>
  82 <p class="p2"><br></p>
  83 <p class="p1"><b>storeOn(stream)</b></p>
  84 <p class="p2"><br></p>
  85 <p class="p1">Write a compileable string representation to the stream.</p>
  86 <p class="p2"><br></p>
  87 <p class="p2"><br></p>
  88 <p class="p2"><br></p>
  89 <p class="p2"><br></p>
  90 <p class="p5"><b>Examples</b></p>
  91 <p class="p6"><br></p>
  92 <p class="p7">// associations can be a good way to store named data in order:</p>
  93 <p class="p3">(</p>
  94 <p class="p3">a = [<span class="s4">\x</span> -&gt; 700, <span class="s4">\y</span> -&gt; 200, <span class="s4">\z</span> -&gt; 900];</p>
  95 <p class="p8"><br></p>
  96 <p class="p3">fork {</p>
  97 <p class="p3"><span class="Apple-tab-span">     </span>a.do { <span class="s5">|assoc|</span></p>
  98 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>assoc.key.postln;</p>
  99 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>assoc.value.postln;</p>
 100 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>(freq: assoc.value).play;</p>
 101 <p class="p3"><span class="Apple-tab-span">     </span><span class="Apple-tab-span">    </span>2.wait;</p>
 102 <p class="p3"><span class="Apple-tab-span">     </span>}</p>
 103 <p class="p3">};</p>
 104 <p class="p3">)</p>
 105 <p class="p8"><br></p>
 106 <p class="p8"><br></p>
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