177 lines
7.5 KiB
Groff
177 lines
7.5 KiB
Groff
<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<title>subset() | reference | Processing.js</title>
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<div class="container">
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<div class="header">
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<a href="http://processingjs.org/"><img src="../images/header.png" width="177" height="42"></a>
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</div>
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<span class="tagline">a port of the Processing Visualization Language</span>
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<div class="navbar">
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<canvas width="940px" height="78px" data-processing-sources="/sketches/bannerSketch.pde"></canvas>
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<li><a href="http://processingjs.org/"><span>home</span></a></li>
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<li><a href="http://processingjs.org/download/"><span>download</span></a></li>
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<li><a href="index.html"><span>reference</span></a></li>
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<li><a href="http://processingjs.org/exhibition/"><span>exhibition</span></a></li>
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<li><a href="http://processingjs.org/learning/"><span>learning</span></a></li>
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<a class="viewsource" href="http://processingjs.org/sketches/bannerSketch.pde">view source</a>
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</div>
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<div class="page row">
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<div class="span11">
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<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>subset()</h3></td>
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</tr>
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<tr class="">
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<th scope="row">Examples</th>
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<td><div class="example"><pre>String[] sa1 = { "OH ", "NY ", "CA ", "VA ", "CO ", "IL "};
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String[] sa2 = subset(sa1, 1);
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println(sa2); // Prints NY, CA, VA, CO, IL
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println();
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String[] sa3 = subset(sa1, 2, 3);
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println(sa3); // Prints CA, VA, CO</pre></div></td>
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</tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>
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<p>Extracts an array of elements from an existing array. The array parameter defines the array from which the elements will
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be copied and the offset and length parameters determine which elements to extract. If no length is given, elements will be extracted from the offset to the end of the array. When specifying the offset remember the first array element is 0.
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This function does not change the source array.</p>
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<p>When using an array of objects, the data returned from the function must be cast to the object array's data type.
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For example: SomeClass[] items = (SomeClass[]) subset(originalArray, 0, 4).</p></td>
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</tr>
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<tr class="">
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<th scope="row">Syntax</th>
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<td><pre>subset(<kbd>array</kbd>,<kbd>offset</kbd>)</pre><br />
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<pre>subset(<kbd>array</kbd>,<kbd>offset</kbd>,<kbd>length</kbd>)</pre></td>
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</tr>
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<tr class="">
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<th scope="row">Parameters</th>
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<td><table cellpadding="0" cellspacing="0" border="0">
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<tr class="">
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<th scope="row">array</th>
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<td>boolean[], byte[], char[], int[], float[], String[], or an array of objects</td>
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</tr>
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<tr class="">
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<th scope="row">offset</th>
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<td>int: position to gebin</td>
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</tr>
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<tr class="">
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<th scope="row">length</th>
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<td>int: number of values to extract</td>
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</tr>
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</table></td>
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</tr>
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<tr class="">
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<th scope="row">Returns</th>
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<td>Array (the same datatype as the input)</td>
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</tr>
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<tr class="">
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<th scope="row">Usage</th>
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<td>Web & Application</td>
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</tr>
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<tr class="">
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<th scope="row">Related</th>
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<td><a href="splice_.1">splice()</a></td>
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</tr>
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</table>
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<div class="cclicense">
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<p>This reference is licensed under the CC BY-NC-SA 2.0 license:</p>
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<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/2.0/">
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<img alt="Creative Commons License" border="0" src="../images/somerights20.gif" />
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</a>
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</div>
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</div>
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<div class="sidebar span4">
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<h3><a href="http://processingjs.org/download/">Downloads</a></h3>
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<ul>
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<li><a href="http://processingjs.org/download/">Download the latest version of Processing.js!</a></li>
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</ul>
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<h3><a href="http://processingjs.org/articles/">Articles</a></h3>
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<ul>
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<li><a href="http://processingjs.org/articles/jsQuickStart.html">Quick Start - JavaScript Developer</a></li>
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<li><a href="http://processingjs.org/articles/p5QuickStart.html">Quick Start - Processing Developer</a></li>
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<li><a href="http://processingjs.org/articles/RenderingModes.html">Rendering Modes</a></li>
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<li><a href="http://processingjs.org/articles/PomaxGuide.html">Pomax's Guide to processing-js</a></li>
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</ul>
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<h3><a>Web IDEs</a></h3>
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<ul>
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<li><a href="http://sketchpad.cc">Sketchpad.cc</a></li>
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<li><a href="http://processingjs.org/tools/processing-helper.html">Processing.js Helper</a></li>
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<li><a href="http://www.openprocessing.org">OpenProcessing.org</a></li>
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</ul>
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<h3><a href="http://processingjs.org/community/">Community</a></h3>
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<ul>
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<li><a href="irc://irc.mozilla.org/processing.js">IRC Channel</a></li>
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<li><a href="http://processing-js.lighthouseapp.com/">Bug Tracker</a></li>
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<li><a href="http://github.com/processing-js/processing-js/">Github Repository</a></li>
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<li><a href="http://groups.google.com/group/processingjs">Google Group</a></li>
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<li><a href="http://zenit.senecac.on.ca/wiki/index.php/">Open Source @ Seneca</a></li>
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</ul>
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<h3><a href="http://twitter.com/processingjs">Twitter Feed</a></h3>
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<div class="twitter"></div>
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</div>
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</div>
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<div class="footer">
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Processing is an open visualization language developed by
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<a href="http://benfry.com/">Ben Fry</a> & <a href="http://reas.com/">Casey Reas</a>,
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and originally ported to Javascript by
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<a href="http://ejohn.org/blog/processingjs/">John Resig</a>.
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Processing.js is maintained by the Processing.js team.
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</div>
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</div>
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<a href="http://github.com/processing-js/processing-js/">
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<img style="position: absolute; top: 0; right: 0; border: 0;" src="../images/forkme-right-orange.png" alt="Fork me on GitHub">
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