Michael Bayne
09f0bee0f3
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4602 542714f4-19e9-0310-aa3c-eee0fc999fb1
82 lines
2.3 KiB
ActionScript
82 lines
2.3 KiB
ActionScript
//
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// $Id$
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//
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// Narya library - tools for developing networked games
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// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
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// http://www.threerings.net/code/narya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.util {
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import flash.errors.IllegalOperationError;
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/**
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* Provides a generic iterator for an Array.
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* No co-modification checking is done.
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*/
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public class ArrayIterator
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implements Iterator
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{
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/**
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* Create an ArrayIterator.
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*/
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public function ArrayIterator (arr :Array, allowRemove :Boolean = true)
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{
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_arr = arr;
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_index = 0;
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_lastIndex = allowRemove ? -1 : -2;
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}
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// documentation inherited from interface Iterator
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public function hasNext () :Boolean
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{
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return (_index < _arr.length);
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}
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// documentation inherited from interface Iterator
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public function next () :Object
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{
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if (_lastIndex != -2) {
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_lastIndex = _index;
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}
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return _arr[_index++];
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}
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// documentation inherited from interface Iterator
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public function remove () :void
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{
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if (_lastIndex < 0) {
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throw new IllegalOperationError();
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} else {
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_arr.splice(_lastIndex, 1);
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_lastIndex = -1;
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_index--; // since _lastIndex is always before _index
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}
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}
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/** The array we're iterating over. */
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protected var _arr :Array;
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/** The current index. */
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protected var _index :int;
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/** The last-removed index.
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* Or -1 for already removed, -2 for no removals allowed. */
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protected var _lastIndex :int;
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}
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}
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