Front page | perl.beginners |
Postings from April 2010
> $str =~ m{ \A ( .{0,15} .*? ) \s }msx;
Yeah, this would do. I talked about the scenario where you didn't put "{0,15}", but just "{15}". In that case, it wouldn't work if the value given in the match string (15 as per above eg.) is greater than the character count of the particular string (36).
<Code>
my $str = "The black cat climbed the green tree";
print "string: $str\n";
$str =~ m{ \A ( .{50} .*? ) \s }msx;
my $extracted = $1;
print "extracted: $extracted\n";
<?Code>
Result:
string: The black cat climbed the green tree
Use of uninitialized value in concatenation (.) or string at scripts/test/test2.pl line 14.
extracted:
But it worked for the OP (the above condition may not have been required for him) and that's what is important :-)
Regards,
Akhthar Parvez K
http://Tips.SysAdminGUIDE.COM
UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity - Dennie Richie
On Sunday 18 Apr 2010, Shawn H Corey wrote:
> Akhthar Parvez K wrote:
> > Hi Shawn,
> >
> >> $str =~ m{ \A ( .{15} .*? ) \s }msx;
> >
> > I don't think this would work if the value given in the match string (15 as per above eg.) is greater than the character count of the particular string. Right?
>
> No, it will fail if $str is less than 15 characters. Try:
>
> #!/usr/bin/perl
>
> use strict;
> use warnings;
>
> for my $str ( "The black cat climbed the green tree", 'A test' ){
> my $extracted = extract( $str );
> print "string: $str\n";
> print "string: $extracted\n";
> }
>
> sub extract {
> my $str = shift @_;
>
> my $extracted = $1;
>
> return $extracted;
> }
>
> __END__
>
> --
> Just my 0.00000002 million dollars worth,
> Shawn
>
> Programming is as much about organization and communication
> as it is about coding.
>
> I like Perl; it's the only language where you can bless your
> thingy.
>
> Eliminate software piracy: use only FLOSS.
>
Thread Previous
|
Thread Next