[sf-perl] Anyone know why won't this work?

ackerman dudley rdacker at comcast.net
Wed Jul 24 11:33:18 PDT 2013


and of course, it doesn't even have to be created as a separate string:
...
print "Second thru last element:  @str[1..$#str]\n";

On Jul 24, 2013, at 11:21 AM, Sean McKenna <sean at mckennaprod.com> wrote:

> I think that the @str[1..$#str] also needs to be double quoted
> otherwise you get a Use of uninitialized value in concatenation error.
> 
> At least in my version 5.12
> 
> #!/usr/bin/perl -w
> 
> my $string = "The good\n\nThe bad\n\nThe Ugly";
> 
> my @str = split /\n\n/, $string;
> 
> print "Second thru last element: " . "@str[1..$#str]" . "\n";
> 
> This works for me
> 
> On Wed, Jul 24, 2013 at 10:21 AM, Randy J. Ray <rjray at blackperl.com> wrote:
>> On 07/24/2013 10:12 AM, Richard Reina wrote:
>>> 
>>> Sorry I'm still confused.  I get the same thing when I put string in
>>> double quotes.
>>> 
>>> #!/usr/bin/perl -w
>>> 
>>> my $string = "The good\n\nThe bad\n\nThe Ugly";
>>> 
>>> my @str = split /\n\n/, $string;
>>> 
>>> print "Second thru last element: " . $str[1..$#str] . "\n";
>>> 
>>> OUTPUT:
>>> 
>>> perl test_split.pl
>>> Use of uninitialized value within @str in range (or flip) at
>>> test_split.pl line 7.
>>> Argument "" isn't numeric in array element at test_split.pl line 7.
>>> Second thru last element: The good
>> 
>> 
>> Oops, my bad. I didn't notice that you aren't really getting an array slice
>> on the last line. That needs to be:
>> 
>> print "Second thru last element: " . @str[1..$#str] . "\n";
>> 
>> Note the "@" before str.
>> 
>> 
>> Randy
>> --
>> """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>> Randy J. Ray      Sunnyvale, CA      http://www.rjray.org
>> rjray at blackperl.com
>> 
>> Silicon Valley Scale Modelers: http://www.svsm.org
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