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Do you have:

use strict; use warnings;

at the top of your script? If you don't, try putting it in. If something is going wrong (i.e. the line you're reading in is undef), it will tell you. Also, can you post more of the script? There are a lot of possibilities for what is going wrong. For instance, if you do not have an open ("FILE", "< ./file") or die("Can't open the file $!"); and are just using open ("FILE", "< ./file"); you would always get an undef (or maybe a "") if you read in the lines.


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In reply to Re: Text comparisons by Vautrin
in thread Text comparisons by ScarryJerry

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • 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> <u> <ul>
  • 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).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
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