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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html dir="ltr" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html;charset=UTF-8" />
<meta name="generator" content=
"HTML Tidy for Mac OS X (vers 25 March 2009), see www.w3.org" />
<title>Scala 2.8 コレクション API -- 可変ビット集合</title>
<link rel="stylesheet" type="text/css" href="guide.css" />
</head>
<body dir="ltr">
<table width="100%" cellpadding="0" cellspacing="2">
<tr>
<td bgcolor="#99CCFF"><img alt="" src="blank.png" /></td>
<td bgcolor="#99CCFF"><a href="collections_23.html"><img border="0"
alt="具象可変コレクションクラス" src="up.png" /></a></td>
<td bgcolor="#99CCFF"><a href="collections_36.html"><img border="0"
alt="並行マップ" src="previous.png" /></a></td>
<td align="center" bgcolor="#99CCFF" width="100%">
<b>可変ビット集合</b></td>
<td bgcolor="#99CCFF" align="center" class="tocref"><a href=
"collections_49.html">目次</a></td>
</tr>
</table>
<blockquote style=
"border-left: 1px solid gray; font-family: Century, Times, 'Times New Roman', 'MS Gothic', serif; padding-left: 1em;">
最新版は <a href="http://docs.scala-lang.org/ja/overviews/collections/concrete-mutable-collection-classes.html">Scala Documentation</a> に移行しました。
</blockquote>
<h2>可変ビット集合</h2>
<p>可変ビット集合 (<a href=
"http://www.scala-lang.org/api/current/scala/collection/mutable/BitSet.html"><tt>mutable.BitSet</tt></a>)
は、変更が上書き処理される他は不変のものとほとんど同じだ。可変ビット集合は、変更しなかった
<tt>Long</tt> をコピーしなくても済むぶん不変ビット集合に比べて少し効率的だ。</p>
<div class="quote">
<table cellspacing="1" cellpadding="0">
<tr>
<td></td>
</tr>
<tr>
<td colspan="99" align="left"><tt>scala> <font color=
"#0000E5">val</font> bits = scala.collection.mutable.</tt><tt>BitSet.empty</tt></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td colspan="99" align="left"><tt><font color=
"#590000">bits: scala.collection.mutable.</font></tt><tt><font color="#590000">BitSet = BitSet()</font></tt></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td colspan="99" align="left">
<tt>scala> bits += <font color=
"#000000">1</font></tt></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td colspan="99" align="left"><tt><font color=
"#590000">res49: bits.type = BitSet(1)</font></tt></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td colspan="99" align="left">
<tt>scala> bits += <font color=
"#000000">3</font></tt></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td colspan="99" align="left"><tt><font color=
"#590000">res50: bits.type = BitSet(1, 3)</font></tt></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td colspan="99" align="left"><tt>scala> bits</tt></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td colspan="99" align="left"><tt><font color=
"#590000">res51: scala.collection.mutable.</font></tt><tt><font color="#590000">BitSet = BitSet(1, 3)</font></tt></td>
</tr>
</table>
</div>
<p>続いては、<a href="collections_38.html">配列</a></p>
<hr />
<table width="100%" cellpadding="0" cellspacing="2">
<tr>
<td bgcolor="#99CCFF"><img alt="" src="blank.png" /></td>
<td bgcolor="#99CCFF"><a href="collections_23.html"><img border="0"
alt="具象可変コレクションクラス" src="up.png" /></a></td>
<td bgcolor="#99CCFF"><a href="collections_36.html"><img border="0"
alt="並行マップ" src="previous.png" /></a></td>
<td align="center" bgcolor="#99CCFF" width="100%">
<b>可変ビット集合</b></td>
<td bgcolor="#99CCFF" align="center" class="tocref"><a href=
"collections_49.html">目次</a></td>
</tr>
</table>
</body>
</html>