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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 -- リストバッファ</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"><a href="collections_26.html"><img border="0"
alt="文字列ビルダ" src="next.png" /></a></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_24.html"><img border="0"
alt="配列バッファ" src="previous.png" /></a></td>
<td align="center" bgcolor="#99CCFF" width="100%">
<b>リストバッファ</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>リストバッファ</h2>
<p>リストバッファ (<a href=
"http://www.scala-lang.org/api/current/scala/collection/mutable/ListBuffer.html"><tt>ListBuffer</tt></a>)
は、内部に配列の代わりに連結リストを使うこと以外は配列バッファに似ている。バッファを構築後にリストに変換する予定なら、配列バッファの代わりにリストバッファを使うべきだ。</p>
<div class="quote">
<table cellspacing="1" cellpadding="0">
<tr>
<td colspan="99" align="left"><tt>scala> <font color=
"#0000E5">val</font> buf = scala.collection.mutable.</tt><tt>ListBuffer.empty[<font color="#660099">Int</font>]</tt></td>
</tr>
<tr>
<td colspan="99" align="left"><tt><font color=
"#590000">buf: scala.collection.mutable.</font></tt><tt><font color="#590000">ListBuffer[Int] = ListBuffer()</font></tt></td>
</tr>
<tr>
<td colspan="99" align="left">
<tt>scala> buf += <font color=
"#000000">1</font></tt></td>
</tr>
<tr>
<td colspan="99" align="left"><tt><font color=
"#590000">res35: buf.type = ListBuffer(1)</font></tt></td>
</tr>
<tr>
<td colspan="99" align="left">
<tt>scala> buf += <font color=
"#000000">10</font></tt></td>
</tr>
<tr>
<td colspan="99" align="left"><tt><font color=
"#590000">res36: buf.type = ListBuffer(1, 10)</font></tt></td>
</tr>
<tr>
<td colspan="99" align="left">
<tt>scala> buf.toList</tt></td>
</tr>
<tr>
<td colspan="99" align="left"><tt><font color=
"#590000">res37: List[Int] = List(1, 10)</font></tt></td>
</tr>
</table>
</div>
<p>続いては、<a href="collections_26.html">文字列ビルダ</a></p>
<hr />
<table width="100%" cellpadding="0" cellspacing="2">
<tr>
<td bgcolor="#99CCFF"><a href="collections_26.html"><img border="0"
alt="文字列ビルダ" src="next.png" /></a></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_24.html"><img border="0"
alt="配列バッファ" src="previous.png" /></a></td>
<td align="center" bgcolor="#99CCFF" width="100%">
<b>リストバッファ</b></td>
<td bgcolor="#99CCFF" align="center" class="tocref"><a href=
"collections_49.html">目次</a></td>
</tr>
</table>
</body>
</html>