Note that a question mark after a quantifier ( {2}?) does not mean optional, but rather non-greedy. You need to put parens around the sub-expression to make it optional:
/^(\d{6}\.?(?:\d{2})?\w?$/;
If the optionals aren't independent, you may need to nest them:
/^(\d{6} #leading digits
(?:\.? #if dot, then
(?:(?:\d{2})? #if two digits, then
\w?)))$/x; #maybe a character
Note the use of anchors, to prevent matching part of the name.
We're not really tightening our belts, it just feels that way because we're getting fatter.
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Are you posting in the right place? Check out Where do I post X? to know for sure.
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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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