Actually all three arguments to split [pattern;[, expression, limit]] are optional.
I find that statement misleading. See the 'template' at the top of spilt:
This implicitly (and rightly) excludes:
Which is exactly what the OP tries to do in the line:
@mails = split ('$line');
This is why the OP's code generates the following error:
Use of uninitialized value $_ in split at XX.pl line YY.
IOW, the 'expression' argument is optional only if the 'pattern' argument is present.
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.