Getting Trouble with REGEXP

by Oromis92 (Sexton)

on Jun 22, 2009 at 18:15 UTC ( [id://773715]=perlquestion: print w/replies, xml )

Need Help??

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";
[download]

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";
[download]

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

Comment on Getting Trouble with REGEXP Select or Download Code

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': `$nums =~ s/\D/ /g;` [download] Search for 'modifier' in perlop.	[reply] [d/l]
Re: Getting Trouble with REGEXP by ikegami (Patriarch) on Jun 22, 2009 at 18:23 UTC
It finds a non-digit and replaces it with a space. If you want it to do it repeatedly, use /g. `$nums =~ s/\D/ /g;` [download] See `s/PATTERN/REPLACEMENT/...` under "Regexp Quote-Like Operators" in perlop. ( er, the documentation of /g was moved to perlre in 5.10 )	[reply] [d/l] [select]
Re: Getting Trouble with REGEXP by zwon (Abbot) on Jun 22, 2009 at 18:24 UTC
`$nums =~ s/\D/ /g;`	[reply] [d/l]
Re: Getting Trouble with REGEXP by linuxer (Curate) on Jun 22, 2009 at 19:42 UTC
`$nums =~ tr/0-9/ /c;` [download] see tr/SEARCHLIST/REPLACEMENTLIST/cds for details.	[reply] [d/l]

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