When in doubt, trust the actual Perl documentation over any other website. Type "perldoc perlop" at your command line.
The issue with the unofficial documentation you found is that tr does not take special regular expression escapes like "\d" or bracketed classes like "[abc]" in its arguments.
Note that "tr" does not do regular expression character classes such as "\d" or "[:lower:]".
$string =~ tr/0123456789/ /c;
It does support ranges, but use no brackets. Shortcut the above with the special hyphen:
$string =~ tr/0-9/ /c;
--
[ e d @ h a l l e y . c c ]
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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
or How to display code and escape characters
are good places to start.
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