src/cm/media/js/lib/yui/yui3.0.0/api/substitute.js.html
author raph
Mon, 23 Nov 2009 15:14:29 +0100
changeset 0 40c8f766c9b8
permissions -rw-r--r--
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html xmlns:yui="http://yuilibrary.com/rdf/1.0/yui.rdf#">
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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>API: substitute   substitute.js  (YUI Library)</title>
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	<link rel="stylesheet" type="text/css" href="assets/reset-fonts-grids-min.css" />
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	<link rel="stylesheet" type="text/css" href="assets/api.css" />
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    <script type="text/javascript" src="assets/api-js"></script>
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    <script type="text/javascript" src="assets/ac-js"></script>
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</head>
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<body id="yahoo-com">
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<div id="doc3" class="yui-t2">
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	<div id="hd">
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        <h1><a href="http://developer.yahoo.com/yui/" title="Yahoo! UI Library">Yahoo! UI Library</a></h1>
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        <h3>substitute&nbsp; <span class="subtitle">3.0.0</span></h3>
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        <a href="./index.html" title="Yahoo! UI Library">Yahoo! UI Library</a> 
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            &gt; <a href="./module_substitute.html" title="substitute">substitute</a>
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                 &gt; substitute.js (source view) 
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        <form onsubmit="return false">
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            <div id="propertysearch">
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                Search: <input autocomplete="off" id="searchinput" />
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                <div id="searchresults">
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                    &nbsp;
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                </div>
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            </div>
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        </form>
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	</div>
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	<div id="bd">
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		<div id="yui-main">
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			<div class="yui-b">
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            <form action="#" name="yui-classopts-form" method="get" id="yui-classopts-form">
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                <fieldset>
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                    <legend>Filters</legend>
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                <span class="classopts"><input type="checkbox" name="show_private" id="show_private" /> <label for="show_private">Show Private</label></span>
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                <span class="classopts"><input type="checkbox" name="show_protected" id="show_protected" /> <label for="show_protected">Show Protected</label></span>
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                <span class="classopts"><input type="checkbox" name="show_deprecated" id="show_deprecated" /> <label for="show_deprecated">Show Deprecated</label></span>
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                </fieldset>
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            </form>
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                    <div id="srcout">
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                        <style>
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                            #doc3 .classopts { display:none; }
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                        </style>
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                        <div class="highlight" ><pre><span class="c">/**</span>
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<span class="c"> * String variable substitution and string formatting.</span>
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<span class="c"> * If included, the substitute method is added to the YUI instance.</span>
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<span class="c"> *</span>
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<span class="c"> * @module substitute</span>
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<span class="c"> */</span>
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    <span class="k">var</span> <span class="nx">L</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">Lang</span><span class="o">,</span> <span class="nx">DUMP</span><span class="o">=</span><span class="s1">&#39;dump&#39;</span><span class="o">,</span> <span class="nx">SPACE</span><span class="o">=</span><span class="s1">&#39; &#39;</span><span class="o">,</span> <span class="nx">LBRACE</span><span class="o">=</span><span class="s1">&#39;{&#39;</span><span class="o">,</span> <span class="nx">RBRACE</span><span class="o">=</span><span class="s1">&#39;}&#39;</span><span class="o">,</span>
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    <span class="c">/**</span>
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<span class="c">     * The following methods are added to the YUI instance</span>
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<span class="c">     * @class YUI~substitute</span>
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<span class="c">     */</span>
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     <span class="c">// @todo template configurability is not implemented yet</span>
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<span class="c"></span>     <span class="c">// @param ldelim {string} optional left delimiter for the replacement token (default: left brace)</span>
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<span class="c"></span>     <span class="c">// @param rdelim {string} optional right delimiter for the replacement token (default: right brace)</span>
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<span class="c"></span>
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    <span class="c">/**</span>
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<span class="c">     * Does variable substitution on a string. It scans through the string </span>
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<span class="c">     * looking for expressions enclosed in { } braces. If an expression </span>
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<span class="c">     * is found, it is used a key on the object.  If there is a space in</span>
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<span class="c">     * the key, the first word is used for the key and the rest is provided</span>
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<span class="c">     * to an optional function to be used to programatically determine the</span>
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<span class="c">     * value (the extra information might be used for this decision). If </span>
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<span class="c">     * the value for the key in the object, or what is returned from the</span>
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<span class="c">     * function has a string value, number value, or object value, it is </span>
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<span class="c">     * substituted for the bracket expression and it repeats.  If this</span>
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<span class="c">     * value is an object, it uses the Object&#39;s toString() if this has</span>
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<span class="c">     * been overridden, otherwise it does a shallow dump of the key/value</span>
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<span class="c">     * pairs if Y.dump is available (if dump isn&#39;t available, toString()</span>
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<span class="c">     * is used).</span>
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<span class="c">     *</span>
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<span class="c">     * This method is included in the &#39;substitute&#39; module.  It is not included</span>
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<span class="c">     * in the YUI module.</span>
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<span class="c">     *</span>
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<span class="c">     * @method substitute</span>
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<span class="c">     * @param s {string} The string that will be modified.</span>
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<span class="c">     * @param o An object containing the replacement values</span>
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<span class="c">     * @param f {function} An optional function that can be used to</span>
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<span class="c">     *                     process each match.  It receives the key,</span>
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<span class="c">     *                     value, and any extra metadata included with</span>
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<span class="c">     *                     the key inside of the braces.</span>
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<span class="c">     * @return {string} the substituted string</span>
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<span class="c">     */</span>
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    <span class="nx">substitute</span> <span class="o">=</span> <span class="k">function</span> <span class="o">(</span><span class="nx">s</span><span class="o">,</span> <span class="nx">o</span><span class="o">,</span> <span class="nx">f</span><span class="o">,</span> <span class="nx">ldelim</span><span class="o">,</span> <span class="nx">rdelim</span><span class="o">)</span> <span class="o">{</span>
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        <span class="k">var</span> <span class="nx">i</span><span class="o">,</span> <span class="nx">j</span><span class="o">,</span> <span class="nx">k</span><span class="o">,</span> <span class="nx">key</span><span class="o">,</span> <span class="nx">v</span><span class="o">,</span> <span class="nx">meta</span><span class="o">,</span> <span class="nx">saved</span><span class="o">=[],</span> <span class="nx">token</span><span class="o">,</span> <span class="nx">dump</span><span class="o">;</span>
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        <span class="nx">ldelim</span> <span class="o">=</span> <span class="nx">ldelim</span> <span class="o">||</span> <span class="nx">LBRACE</span><span class="o">;</span>
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        <span class="nx">rdelim</span> <span class="o">=</span> <span class="nx">rdelim</span> <span class="o">||</span> <span class="nx">RBRACE</span><span class="o">;</span>
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        <span class="k">for</span> <span class="o">(;;)</span> <span class="o">{</span>
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            <span class="nx">i</span> <span class="o">=</span> <span class="nx">s</span><span class="o">.</span><span class="nx">lastIndexOf</span><span class="o">(</span><span class="nx">ldelim</span><span class="o">);</span>
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            <span class="k">if</span> <span class="o">(</span><span class="nx">i</span> <span class="o">&lt;</span> <span class="m">0</span><span class="o">)</span> <span class="o">{</span>
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                <span class="k">break</span><span class="o">;</span>
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            <span class="o">}</span>
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            <span class="nx">j</span> <span class="o">=</span> <span class="nx">s</span><span class="o">.</span><span class="nx">indexOf</span><span class="o">(</span><span class="nx">rdelim</span><span class="o">,</span> <span class="nx">i</span><span class="o">);</span>
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            <span class="k">if</span> <span class="o">(</span><span class="nx">i</span> <span class="o">+</span> <span class="m">1</span> <span class="o">&gt;=</span> <span class="nx">j</span><span class="o">)</span> <span class="o">{</span>
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                <span class="k">break</span><span class="o">;</span>
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            <span class="o">}</span>
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            <span class="c">//Extract key and meta info </span>
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<span class="c"></span>            <span class="nx">token</span> <span class="o">=</span> <span class="nx">s</span><span class="o">.</span><span class="nx">substring</span><span class="o">(</span><span class="nx">i</span> <span class="o">+</span> <span class="m">1</span><span class="o">,</span> <span class="nx">j</span><span class="o">);</span>
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            <span class="nx">key</span> <span class="o">=</span> <span class="nx">token</span><span class="o">;</span>
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            <span class="nx">meta</span> <span class="o">=</span> <span class="kc">null</span><span class="o">;</span>
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            <span class="nx">k</span> <span class="o">=</span> <span class="nx">key</span><span class="o">.</span><span class="nx">indexOf</span><span class="o">(</span><span class="nx">SPACE</span><span class="o">);</span>
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            <span class="k">if</span> <span class="o">(</span><span class="nx">k</span> <span class="o">&gt;</span> <span class="o">-</span><span class="m">1</span><span class="o">)</span> <span class="o">{</span>
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                <span class="nx">meta</span> <span class="o">=</span> <span class="nx">key</span><span class="o">.</span><span class="nx">substring</span><span class="o">(</span><span class="nx">k</span> <span class="o">+</span> <span class="m">1</span><span class="o">);</span>
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                <span class="nx">key</span> <span class="o">=</span> <span class="nx">key</span><span class="o">.</span><span class="nx">substring</span><span class="o">(</span><span class="m">0</span><span class="o">,</span> <span class="nx">k</span><span class="o">);</span>
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            <span class="o">}</span>
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            <span class="c">// lookup the value</span>
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<span class="c"></span>            <span class="nx">v</span> <span class="o">=</span> <span class="nx">o</span><span class="o">[</span><span class="nx">key</span><span class="o">];</span>
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            <span class="c">// if a substitution function was provided, execute it</span>
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<span class="c"></span>            <span class="k">if</span> <span class="o">(</span><span class="nx">f</span><span class="o">)</span> <span class="o">{</span>
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                <span class="nx">v</span> <span class="o">=</span> <span class="nx">f</span><span class="o">(</span><span class="nx">key</span><span class="o">,</span> <span class="nx">v</span><span class="o">,</span> <span class="nx">meta</span><span class="o">);</span>
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            <span class="o">}</span>
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            <span class="k">if</span> <span class="o">(</span><span class="nx">L</span><span class="o">.</span><span class="nx">isObject</span><span class="o">(</span><span class="nx">v</span><span class="o">))</span> <span class="o">{</span>
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                <span class="k">if</span> <span class="o">(!</span><span class="nx">Y</span><span class="o">.</span><span class="nx">dump</span><span class="o">)</span> <span class="o">{</span>
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                    <span class="nx">v</span> <span class="o">=</span> <span class="nx">v</span><span class="o">.</span><span class="nx">toString</span><span class="o">();</span>
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                <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
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                    <span class="k">if</span> <span class="o">(</span><span class="nx">L</span><span class="o">.</span><span class="nx">isArray</span><span class="o">(</span><span class="nx">v</span><span class="o">))</span> <span class="o">{</span>
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                        <span class="nx">v</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">dump</span><span class="o">(</span><span class="nx">v</span><span class="o">,</span> <span class="nb">parseInt</span><span class="o">(</span><span class="nx">meta</span><span class="o">,</span> <span class="m">10</span><span class="o">));</span>
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                    <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
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                        <span class="nx">meta</span> <span class="o">=</span> <span class="nx">meta</span> <span class="o">||</span> <span class="s2">&quot;&quot;</span><span class="o">;</span>
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                        <span class="c">// look for the keyword &#39;dump&#39;, if found force obj dump</span>
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<span class="c"></span>                        <span class="nx">dump</span> <span class="o">=</span> <span class="nx">meta</span><span class="o">.</span><span class="nx">indexOf</span><span class="o">(</span><span class="nx">DUMP</span><span class="o">);</span>
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                        <span class="k">if</span> <span class="o">(</span><span class="nx">dump</span> <span class="o">&gt;</span> <span class="o">-</span><span class="m">1</span><span class="o">)</span> <span class="o">{</span>
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                            <span class="nx">meta</span> <span class="o">=</span> <span class="nx">meta</span><span class="o">.</span><span class="nx">substring</span><span class="o">(</span><span class="m">4</span><span class="o">);</span>
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                        <span class="o">}</span>
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                        <span class="c">// use the toString if it is not the Object toString </span>
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<span class="c"></span>                        <span class="c">// and the &#39;dump&#39; meta info was not found</span>
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<span class="c"></span>                        <span class="k">if</span> <span class="o">(</span><span class="nx">v</span><span class="o">.</span><span class="nx">toString</span><span class="o">===</span><span class="nb">Object</span><span class="o">.</span><span class="nx">prototype</span><span class="o">.</span><span class="nx">toString</span><span class="o">||</span><span class="nx">dump</span><span class="o">&gt;-</span><span class="m">1</span><span class="o">)</span> <span class="o">{</span>
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                            <span class="nx">v</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">dump</span><span class="o">(</span><span class="nx">v</span><span class="o">,</span> <span class="nb">parseInt</span><span class="o">(</span><span class="nx">meta</span><span class="o">,</span> <span class="m">10</span><span class="o">));</span>
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                        <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
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                            <span class="nx">v</span> <span class="o">=</span> <span class="nx">v</span><span class="o">.</span><span class="nx">toString</span><span class="o">();</span>
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                        <span class="o">}</span>
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                    <span class="o">}</span>
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                <span class="o">}</span>
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            <span class="o">}</span> <span class="k">else</span> <span class="k">if</span> <span class="o">(!</span><span class="nx">L</span><span class="o">.</span><span class="nx">isString</span><span class="o">(</span><span class="nx">v</span><span class="o">)</span> <span class="o">&amp;&amp;</span> <span class="o">!</span><span class="nx">L</span><span class="o">.</span><span class="nx">isNumber</span><span class="o">(</span><span class="nx">v</span><span class="o">))</span> <span class="o">{</span>
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                <span class="c">// This {block} has no replace string. Save it for later.</span>
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<span class="c"></span>                <span class="nx">v</span> <span class="o">=</span> <span class="s2">&quot;~-&quot;</span> <span class="o">+</span> <span class="nx">saved</span><span class="o">.</span><span class="nx">length</span> <span class="o">+</span> <span class="s2">&quot;-~&quot;</span><span class="o">;</span>
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                <span class="nx">saved</span><span class="o">[</span><span class="nx">saved</span><span class="o">.</span><span class="nx">length</span><span class="o">]</span> <span class="o">=</span> <span class="nx">token</span><span class="o">;</span>
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                <span class="c">// break;</span>
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<span class="c"></span>            <span class="o">}</span>
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            <span class="nx">s</span> <span class="o">=</span> <span class="nx">s</span><span class="o">.</span><span class="nx">substring</span><span class="o">(</span><span class="m">0</span><span class="o">,</span> <span class="nx">i</span><span class="o">)</span> <span class="o">+</span> <span class="nx">v</span> <span class="o">+</span> <span class="nx">s</span><span class="o">.</span><span class="nx">substring</span><span class="o">(</span><span class="nx">j</span> <span class="o">+</span> <span class="m">1</span><span class="o">);</span>
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        <span class="o">}</span>
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        <span class="c">// restore saved {block}s</span>
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<span class="c"></span>        <span class="k">for</span> <span class="o">(</span><span class="nx">i</span><span class="o">=</span><span class="nx">saved</span><span class="o">.</span><span class="nx">length</span><span class="o">-</span><span class="m">1</span><span class="o">;</span> <span class="nx">i</span><span class="o">&gt;=</span><span class="m">0</span><span class="o">;</span> <span class="nx">i</span><span class="o">=</span><span class="nx">i</span><span class="o">-</span><span class="m">1</span><span class="o">)</span> <span class="o">{</span>
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            <span class="nx">s</span> <span class="o">=</span> <span class="nx">s</span><span class="o">.</span><span class="nx">replace</span><span class="o">(</span><span class="k">new</span> <span class="nb">RegExp</span><span class="o">(</span><span class="s2">&quot;~-&quot;</span> <span class="o">+</span> <span class="nx">i</span> <span class="o">+</span> <span class="s2">&quot;-~&quot;</span><span class="o">),</span> <span class="nx">ldelim</span>  <span class="o">+</span> <span class="nx">saved</span><span class="o">[</span><span class="nx">i</span><span class="o">]</span> <span class="o">+</span> <span class="nx">rdelim</span><span class="o">,</span> <span class="s2">&quot;g&quot;</span><span class="o">);</span>
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        <span class="o">}</span>
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        <span class="k">return</span> <span class="nx">s</span><span class="o">;</span>
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    <span class="o">};</span>
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    <span class="nx">Y</span><span class="o">.</span><span class="nx">substitute</span> <span class="o">=</span> <span class="nx">substitute</span><span class="o">;</span>
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    <span class="nx">L</span><span class="o">.</span><span class="nx">substitute</span> <span class="o">=</span> <span class="nx">substitute</span><span class="o">;</span>
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</pre></div>
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                    </div>
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			</div>
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		</div>
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		<div class="yui-b">
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            <div class="nav">
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                    <div id="moduleList" class="module">
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                        <h4>Modules</h4>
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                        <ul class="content">
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                                <li class=""><a href="module_anim.html" title="anim">anim</a></li>
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                                <li class=""><a href="module_async-queue.html" title="async-queue">async-queue</a></li>
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                                <li class=""><a href="module_attribute.html" title="attribute">attribute</a></li>
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                                <li class=""><a href="module_base.html" title="base">base</a></li>
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                                <li class=""><a href="module_cache.html" title="cache">cache</a></li>
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                                <li class=""><a href="module_classnamemanager.html" title="classnamemanager">classnamemanager</a></li>
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                                <li class=""><a href="module_collection.html" title="collection">collection</a></li>
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                                <li class=""><a href="module_console.html" title="console">console</a></li>
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                                <li class=""><a href="module_console-filters.html" title="console-filters">console-filters</a></li>
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                                <li class=""><a href="module_cookie.html" title="cookie">cookie</a></li>
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                                <li class=""><a href="module_dataschema.html" title="dataschema">dataschema</a></li>
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                                <li class=""><a href="module_datasource.html" title="datasource">datasource</a></li>
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                                <li class=""><a href="module_datatype.html" title="datatype">datatype</a></li>
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                                <li class=""><a href="module_dd.html" title="dd">dd</a></li>
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                                <li class=""><a href="module_dom.html" title="dom">dom</a></li>
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                                <li class=""><a href="module_dump.html" title="dump">dump</a></li>
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                                <li class=""><a href="module_event.html" title="event">event</a></li>
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                                <li class=""><a href="module_event-custom.html" title="event-custom">event-custom</a></li>
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                                <li class=""><a href="module_event-simulate.html" title="event-simulate">event-simulate</a></li>
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                                <li class=""><a href="module_history.html" title="history">history</a></li>
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                                <li class=""><a href="module_imageloader.html" title="imageloader">imageloader</a></li>
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                                <li class=""><a href="module_io.html" title="io">io</a></li>
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                                <li class=""><a href="module_json.html" title="json">json</a></li>
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                                <li class=""><a href="module_node.html" title="node">node</a></li>
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                                <li class=""><a href="module_node-focusmanager.html" title="node-focusmanager">node-focusmanager</a></li>
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                                <li class=""><a href="module_node-menunav.html" title="node-menunav">node-menunav</a></li>
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                                <li class=""><a href="module_oop.html" title="oop">oop</a></li>
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                                <li class=""><a href="module_overlay.html" title="overlay">overlay</a></li>
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                                <li class=""><a href="module_plugin.html" title="plugin">plugin</a></li>
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                                <li class=""><a href="module_profiler.html" title="profiler">profiler</a></li>
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                                <li class=""><a href="module_queue-promote.html" title="queue-promote">queue-promote</a></li>
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                                <li class=""><a href="module_slider.html" title="slider">slider</a></li>
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                                <li class=""><a href="module_stylesheet.html" title="stylesheet">stylesheet</a></li>
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                                <li class="selected"><a href="module_substitute.html" title="substitute">substitute</a></li>
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                                <li class=""><a href="module_test.html" title="test">test</a></li>
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                                <li class=""><a href="module_widget.html" title="widget">widget</a></li>
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                                <li class=""><a href="module_widget-position.html" title="widget-position">widget-position</a></li>
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                                <li class=""><a href="module_widget-position-ext.html" title="widget-position-ext">widget-position-ext</a></li>
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                                <li class=""><a href="module_widget-stack.html" title="widget-stack">widget-stack</a></li>
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                                <li class=""><a href="module_widget-stdmod.html" title="widget-stdmod">widget-stdmod</a></li>
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                                <li class=""><a href="module_yui.html" title="yui">yui</a></li>
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                        </ul>
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                    </div>
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                    <div id="classList" class="module">
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                        <h4>Classes</h4>
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                        <ul class="content">
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                                <li class=""><a href="YUI~substitute.html" title="YUI~substitute">YUI~substitute</a></li>
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                        </ul>
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                    </div>
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                    <div id="fileList" class="module">
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                        <h4>Files</h4>
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                        <ul class="content">        
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                                <li class="selected"><a href="substitute.js.html" title="substitute.js">substitute.js</a></li>
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                        </ul>
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                    </div>
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            </div>
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		</div>
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	</div>
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	<div id="ft">
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        <hr />
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        Copyright &copy; 2009 Yahoo! Inc. All rights reserved.
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	</div>
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</div>
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<script type="text/javascript">
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    ALL_YUI_PROPS = [{"access": "", "host": "YUI~substitute", "name": "substitute", "url": "YUI~substitute.html#method_substitute", "type": "method"}];
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</script>
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</body>
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</html>