Regarding matching numbers ... I have recently gone back to using the old-school 


/[0-9]+/

[download]

because of (in Using character classes) 


Since the introduction of Unicode, unless the //a modifier is in effec
+t, these character classes match more than just a few characters in t
+he ASCII range.

\d matches a digit, not just [0-9] but also digits from non-roman scri
+pts

[download]

There are a lot of characters flying around out there. But some stuff still needs to be limited to ASCII -- for example book ref numbers, even if your book titles may have non-Roman characters; or a primary key from a database table in a multilingual CMS ...

So if you want to make sure you are matching only Roman script digits, and you need to work on perls older than 5.14, you should probably use the old [0-9]. If you have a new perl, you can do: 


/\d+/a

[download]

which will limit the match to ASCII characters ...

Remember: Ne dederis in spiritu molere illegitimi!

In reply to Re^2: Perl store as variables regex matches for use outside of loop. by 1nickt
in thread Perl store as variables regex matches for use outside of loop. by john.tm

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.