You can do this using the pos function when performing matching against a string - This function returns the offset of where the last "m//g" search left off for the variable in question ($_ is used when the variable is not specified).

The following code demonstrates this function in action:

#!/opt/bin/perl

$str = 'The quick brown fox jumps over the lazy dog.';

while ( $str =~ /[aeiou]/ig ) {

    printf(
        "%d %s\n",
        pos( $str ), 
        substr( $str, pos( $str ) - 1 )
    );
    substr( $str, 0, pos( $str ), '' );
}

[download]

 

perl -le "print unpack'N', pack'B32', '00000000000000000000001011100101'"

In reply to Re: Is there a regular expression version of the index function? by rob_au
in thread Is there a regular expression version of the index function? by rzward

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.