You don't want the "o" suffix on your regex. In if ($a =~ /$b/o)
, the "o" is making a promise that you won't change the value of $b, so perl doesn't recompile the regex for each $b you create. You probably do
want the "i" suffix to make the matching case-insensitive -- otherwise 'Hello' will not match 'hello'!
Consider this a starting point:'Hello(world)' =~ m/hello\(\w+\)/i # is true
Replace the right side with the variable containing the current regex you want to match and you will be on your way.
BTW, it's generally a good idea to avoid using the variable names $a and $b because they have a special significance to perl (see perldoc -f sort).
Are you posting in the right place? Check out Where do I post X? to know for sure.
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>
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
Want more info? How to link or
or How to display code and escape characters
are good places to start.