foreach my $checked (@chk_acc) 
     {
       chomp();

[download]

chomp() is short for chomp( $_ ) but you don't assign any value to $_ so the use of chomp there is superfluous. 

       if($checked=~/^(\w{3})(\d{4,7})/ig)
        {
          # it should print the accounts starting with letters here

[download]

The \w character class matches all upper case letters and all lower case letters and all digits and the '_' character so the use of the /i option is superfluous and the comment is wrong because \w will also match digits and '_'.    The regular expression is anchored at the beginning of the string in $checked so it will only match once so the use of the /g is also superfluous.    You are also capturing two strings which you aren't using so the capturing parentheses are also superfluous.    So, to sum up, you probably want something like: 

       if ( $checked =~ /^[[:alpha:]]{3}\d{4,7}/ )
        {
          # it should print the accounts starting with letters here

[download]

In reply to Re: Regular Exp. in foreach loop Help! by jwkrahn
in thread Regular Exp. in foreach loop Help! by Anonymous Monk

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


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.