Here's one way to do it:

$count += () = $teststring =~ /(test)/g;

This syntax may be a little crypric at first, so here's the breakdown:

You can assign the results of a match to an array, like so: @matches = $teststring =~ /(test)/g;

Note the use of a capturing match (we use (test) in parentheses), and the /g modifier to match more than once.

Now if you have @matches, then using it in scalar context gives you how many matches there were, so this would work:

$count += @matches; The method I'm suggesting simply does this without the temporay variable. You do need to force the match to take place in list context, otherwise it'll just return 1 on successful matches; that's what the () = bit achieves.

In reply to Re: Counting multiple matches of RegExp in single line by gaal
in thread Counting multiple matches of RegExp in single line by New Novice

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.