shawnhcorey
Enthusiast
Sep 29, 2008, 5:13 AM
Post #2 of 3
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Re: [ajay_csv] Help me in parsing the string
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Hi All,
Please help me finding the match pattern for,
my $t= "Error prone *12345* example";
my $pat="*12345*";
if ( $t =~ /$pat$) {
print "good";
print "\n".$pat;
}
Aboe code is throwing Quantifier follows nothing in regex; marked by <-- HERE in m/* <-- HERE 12345*/ at chopfl.pl line 13.
Please help me over this.
Thank you,
Ajay Vikas.
The character * is a meta-character. It has special meaning inside a pattern. To match an actual *, there are two methods. First you can quotemeta your string (see `perldoc -f quotemeta`). Second, you can do it in the pattern itself with \Q
my $pat = quotemeta( "*12345*" );
Or
$t =~ /\Q$pat\E/
PS EDIT: Oops, there is a third method. This one is tricky. If your pattern in a literal string inside Perl, you can escape the * with a backspace but you'll need two of them. The first is interpreted by string interpolation to mean a backslash character.
$pat = "\\*12345\\*";
If the pattern is in a text file you read in, you place only one backslash in it.
__END__
I love Perl; it's the only language where you can bless your thingy.
Perl documentation is available at perldoc.perl.org. The list of standard modules and pragmatics is available in perlmodlib.
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(This post was edited by shawnhcorey on Sep 29, 2008, 6:17 AM)
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