Just use two regexen, and consider a match successful only if the first regex matches but the second doesn’t. For example, to match sequences containing only letters, digits, and hyphens, but not containing all digits:

#! perl
use strict;
use warnings;

my $re1 = qr{ ^ [\w-]+ $ }x;
my $re2 = qr{ ^  \d+   $ }x;

while (<DATA>)
{
    chomp;
    printf "%s : %s\n", $_, /$re1/ && !/$re2/ ? 'yes' : 'no';
}

__DATA__
foo
1foo
foo2
3foo4
foo5bar
87
foo-bar
foo42-baz
foo17@12

[download]

Output:

17:03 >perl 950_SoPW.pl
foo : yes
1foo : yes
foo2 : yes
3foo4 : yes
foo5bar : yes
87 : no
foo-bar : yes
foo42-baz : yes
foo17@12 : no

17:04 >

[download]

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re: Regex matching words with numbers, but not numbers. by Athanasius
in thread Regex matching words with numbers, but not numbers. by lplo

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.