Folks,

This is Yet Another Regex Question. Yes indeed. The multi-grep example in perlretut works very fine... when not using 'use strict', that is. As soon as 'use strict' is specified, a flurry of the following appears: 

Global symbol "$number" requires explicit package name [...]
Global symbol "@regexp" requires explicit package name [...]
Global symbol "$number" requires explicit package name [...]

[download]

Is it possible to make this code work with 'use strict', and if so, how ? - Thanks !

As a reference, here's how the code is called, and the code itself from perlretut:

Called like:

./multi_grep.pl 2 last for multi_grep.pl

The code (saved as multi_grep.pl): 

$number = shift;
$regexp[$_] = shift foreach (0..$number-1);
@compiled = map qr/$_/, @regexp;
while ($line = <>) {
  foreach $pattern (@compiled) {
    if ($line =~ /$pattern/) {
      print $line;
      last;
    }
  }
}

[download]

In reply to YARQ: multi_grep example in perlretut by carcassonne

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.