Thank you all for your responses, the Monastery has not failed me yet!
BrowserUk, your response provided me with the answer. I realized that my issue was not with grep, but rather with split. I did not realize that split using null (split //) would split by character (e.g. "32" would become 3, 2).
Now I see when the summing takes place. The book glossed over this, but it would have been nice if it had just noted that to jog my memory, which is not so great anymore.
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 How to display code and escape characters
are good places to start.