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<p class="ref-notice">This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, <a href="https://github.com/processing/processing-docs/issues?state=open">please let us know</a>. If you prefer a more technical reference, visit the <a href="http://processing.github.io/processing-javadocs/core/">Processing Core Javadoc</a> and <a href="http://processing.github.io/processing-javadocs/libraries/">Libraries Javadoc</a>.</p>
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>arrayCopy()</h3></td>
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</tr>
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<tr class="">
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<tr class=""><th scope="row">Examples</th><td><div class="example"><pre >
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String[] north = { "OH", "IN", "MI" };
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String[] south = { "GA", "FL", "NC" };
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arrayCopy(north, south);
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println(south);
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// Prints updated array contents to the console:
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// [0] "OH"
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// [1] "IN"
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// [2] "MI"
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</pre></div>
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<div class="example"><pre >
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String[] north = { "OH", "IN", "MI"};
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String[] south = { "GA", "FL", "NC"};
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arrayCopy(north, 1, south, 0, 2);
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println(south);
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// Prints updated array contents to the console:
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// [0] "IN"
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// [1] "MI"
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// [2] "NC"
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</pre></div>
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</td></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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Copies an array (or part of an array) to another array. The <b>src</b> array is copied to the <b>dst</b> array, beginning at the position specified by <b>srcPosition</b> and into the position specified by <b>dstPosition</b>. The number of elements to copy is determined by <b>length</b>. Note that copying values overwrites existing values in the destination array. To append values instead of overwriting them, use <b>concat()</b>.<br />
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<br />
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The simplified version with only two arguments — <b>arrayCopy(src, dst)</b> — copies an entire array to another of the same size. It is equivalent to <b>arrayCopy(src, 0, dst, 0, src.length)</b>.<br />
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<br />
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Using this function is far more efficient for copying array data than iterating through a <b>for()</b> loop and copying each element individually. This function only copies references, which means that for most purposes it only copies one-dimensional arrays (a single set of brackets). If used with a two (or three or more) dimensional array, it will only copy the references at the first level, because a two dimensional array is simply an "array of arrays". This does not produce an error, however, because this is often the desired behavior. Internally, this function calls Java's <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/System.html#arraycopy(java.lang.Object, int, java.lang.Object, int, int)">System.arraycopy()</a> method, so most things that apply there are inherited.
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</td>
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</tr>
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<tr class=""><th scope="row">Syntax</th><td><pre>arrayCopy(<kbd>src</kbd>, <kbd>srcPosition</kbd>, <kbd>dst</kbd>, <kbd>dstPosition</kbd>, <kbd>length</kbd>)
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arrayCopy(<kbd>src</kbd>, <kbd>dst</kbd>, <kbd>length</kbd>)
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arrayCopy(<kbd>src</kbd>, <kbd>dst</kbd>)</pre></td></tr>
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<tr class=""> <th scope="row">Parameters</th><td><table cellpadding="0" cellspacing="0" border="0"><tr class="">
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<th scope="row" class="code">src</th>
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<td>Object: the source array</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">srcPosition</th>
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<td>int: starting position in the source array</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">dst</th>
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<td>Object: the destination array of the same data type as the source array</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">dstPosition</th>
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<td>int: starting position in the destination array</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">length</th>
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<td>int: number of array elements to be copied</td>
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</tr></table></td> </tr>
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<tr class=""><th scope="row">Returns</th><td class="code">void</td></tr>
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<tr class=""><th scope="row">Related</th><td><a class="code" href="concat_.html">concat()</a><br /></td></tr>
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</table>
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Updated on April 30, 2017 02:33:17pm EDT<br /><br />
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