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POC# string serializer converted to Qt
 

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    <p>I have this </p> <pre class="lang-cs prettyprint-override"><code> public static string Serialize(List&lt;string&gt; lst) { StringBuilder output = new StringBuilder(""); foreach (var str in lst) { string inter; inter = str.Count().ToString().Count().ToString() + str.Count().ToString() + str; output.Append(inter); } return output.ToString(); } </code></pre> <p>What this code does is if I have a string <code>troy</code> in it, it will return</p> <pre class="lang-cs prettyprint-override"><code>14troy </code></pre> <p>1 being how many digits in the identifier and 4 being the number of characters in the string.</p> <p>Or if I use <code>stackoverflow</code> it will return</p> <pre class="lang-cs prettyprint-override"><code>213stackoverflow </code></pre> <p>2 being the number of digits in the length identifier and 13 being the number of characters in the message.. </p> <p>I'm trying to convert this to Qt code and I don't understand what .Count() is returning. I know it's in System.Linq. </p> <p>I also need to know how I would achieve this in Qt C++. </p> <p>Edit: After getting Tim Meyer's help I figured out how to do it.. He're's the code</p> <pre class="lang-cs prettyprint-override"><code>QString ObjectSerializer::Serialize( QList&lt;QString&gt; lst ) { QString output; foreach( QString str, lst ) { int strLen = str.length(); int identLeng = QString(QString::number(strLen)).length(); output.append( QString( "%1%2%3" ) .arg( identLeng ) .arg( strLen ) .arg( str ) ); } return output; } </code></pre> <p>ALSO if you're interested in the deserializer (does the opposite) here's the code:</p> <pre class="lang-cs prettyprint-override"><code>QList&lt;QString&gt; ObjectSerializer::Deserialize( QString str ) { if(str.isNull() || str.isEmpty()) return QList&lt;QString&gt;(); QList&lt;QString&gt; items; int index = 0; while(index &lt; str.length()) { int indexLen = QString(str[index]).toInt(); index++; QString subStr = str.mid(index, indexLen); int keyLen = subStr.toInt(); index += indexLen; QString key = str.mid(index, keyLen); index += keyLen; items.append(key); } return items; } </code></pre>
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    1. COThe [Count Extension Method](http://msdn.microsoft.com/en-us/library/system.linq.enumerable.count.aspx) returns the number of elements in a sequence. For example, the number of `char` elements in the sequence `"stackoverflow"` is 13, as `string` implements `IEnumerable<char>`.
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    2. COSo it's like .Length ?
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    3. COIn the case of a `string`, yes.
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