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

Richard Reina gatorreina at gmail.com
Wed Jul 24 13:42:42 PDT 2013


Thank you all for helping me figure that out.  I really appreciate it.


2013/7/24, ackerman dudley <rdacker at comcast.net>:
> 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
>>> _______________________________________________
>>> SanFrancisco-pm mailing list
>>> SanFrancisco-pm at pm.org
>>> http://mail.pm.org/mailman/listinfo/sanfrancisco-pm
>> _______________________________________________
>> SanFrancisco-pm mailing list
>> SanFrancisco-pm at pm.org
>> http://mail.pm.org/mailman/listinfo/sanfrancisco-pm
>
> _______________________________________________
> SanFrancisco-pm mailing list
> SanFrancisco-pm at pm.org
> http://mail.pm.org/mailman/listinfo/sanfrancisco-pm
>


More information about the SanFrancisco-pm mailing list