Re: How can i get a substring from a String?

The solution proposed with substr will work, but only if the preceding characters before www.google.com are always 10 characters long. If that is always the case, then substr will work well. If the character length preceding your URL is variable, may I suggest split and join?

$qname1 = join ".",(split(/\./, $string))[2,3,4];
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The code will only work if there are exactly two dot separated strings prior to the url. If that, too, is variable, then perhaps you could try this small modification:

$qname1 = join ".",(split(/\./, $string))[-3,-2,-1];
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Cheers,
Kristina

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Re^2: How can i get a substring from a String? by Anonymous Monk on Oct 16, 2008 at 13:03 UTC
`#!/usr/bin/perl -- # use strict; use warnings; my $qname = "_sip._udp.www.google.com"; warn substr $qname, index $qname, 'www'; warn substr $qname, length('_udp.') + index $qname, '_udp.'; __END__ www.google.com at substr.index.pl line 9. www.google.com at substr.index.pl line 10.` [download]	[reply] [d/l]

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Re^2: How can i get a substring from a String?
by Anonymous Monk on Oct 16, 2008 at 13:03 UTC

#!/usr/bin/perl --

# 

use strict;
use warnings;

my $qname = "_sip._udp.www.google.com";
warn substr $qname,  index $qname, 'www';
warn substr $qname,  length('_udp.') + index $qname, '_udp.';
__END__
www.google.com at substr.index.pl line 9.
www.google.com at substr.index.pl line 10.
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[reply]
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