The 00 in the term $hash{00} is initially evaluated as a number, rather than a string, because it's not in quotes. Perl then converts the number back into a string to store into the hash. As a result, the assignment
$hash{00} = "data";
actually stores into $hash{"0"}, not $hash{"00"}.
Later, when you try to access $hash{0 . "0"}, you
do access $hash{"00"}, which of course is
not the same as $hash{"0"}.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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