Oromis92 has asked for the wisdom of the Perl Monks concerning the following question: 

$nums = "1,2,3,4,5,6";
$nums =~ s/\D/ /;
print "$nums\n";

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output: "1 2,3,4,5,6" why is that and not: "1 2 3 4 5 6" ? why only the first comma ? and if I change $nums 
$nums = "1_2#3!4.5/6";
$nums =~ s/\D/ /;
print "$nums\n";

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it's the same: "1 2#3!4.5/6" whyyyyy ?

Replies are listed 'Best First'.
Re: Getting Trouble with REGEXP
by toolic (Bishop) on Jun 22, 2009 at 18:23 UTC
    Use the global modifier 'g': 
    $nums =~ s/\D/ /g;

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    Search for 'modifier' in perlop.

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Re: Getting Trouble with REGEXP
by ikegami (Patriarch) on Jun 22, 2009 at 18:23 UTC
    It finds a non-digit and replaces it with a space. If you want it to do it repeatedly, use /g. 
    $nums =~ s/\D/ /g;

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    See s/PATTERN/REPLACEMENT/... under "Regexp Quote-Like Operators" in perlop. ( er, the documentation of /g was moved to perlre in 5.10 )

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Re: Getting Trouble with REGEXP
by zwon (Abbot) on Jun 22, 2009 at 18:24 UTC
    $nums =~ s/\D/ /g;
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Re: Getting Trouble with REGEXP
by linuxer (Curate) on Jun 22, 2009 at 19:42 UTC
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