parsing multiple values with getopt::long

madM has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks,
Im trying to parse multiple values to an array without success.. when i print the array.. i can only see the first value that i enter.. for example if i wanted to parse the numbers 1 2 and 3 --prueba2 1 2 3 then i can only see that the number 1 is in the array
any suggestions?

##!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
use Getopt::Long;

my @array;

GetOptions ( 
                    "prueba2=s" => \@array,

 ) or die "not working: $!\n";

print "@array\n";

exit;
[download]

Comment on parsing multiple values with getopt::long Download Code

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Re: parsing multiple values with getopt::long by toolic (Bishop) on Apr 27, 2014 at 17:28 UTC
As described in the documentation (Options with multiple values), you should use `-prueba` multiple times: `use strict; use warnings; use Data::Dumper; use Getopt::Long; my @array; GetOptions ( "prueba2=s" => \@array, ) or die "not working: $!\n"; print Dumper(\@array); exit; __END__ foo.pl -p 1 -p 2 -p 3 $VAR1 = [ '1', '2', '3' ];` [download]	[reply] [d/l] [select]
Re: parsing multiple values with getopt::long by NetWallah (Canon) on Apr 27, 2014 at 17:28 UTC
Change your "print" statement to : `print "@array\nExtra params: @ARGV";` [download] and you will see the problem. The correct way to pass in multiple values is: `perl <program> --prueba2 1 -prueba2 2 --prueba2 3` [download] You could get the results you are trying without repeating the parameter name, if you use the "experimental" "repeat specifier" getopt feature: `GetOptions ( "prueba2=i{3}" => \@array, ) or die "not working: $!\n";` [download] What is the sound of Perl? Is it not the sound of a wall that people have stopped banging their heads against? -Larry Wall, 1992	[reply] [d/l] [select]
Re: parsing multiple values with getopt::long by RichardK (Parson) on Apr 27, 2014 at 17:32 UTC
The help for Getopt::Long is pretty comprehensive, the section 'Options with multiple values' explains the different ways you could do that.	[reply]
Re: parsing multiple values with getopt::long by karlgoethebier (Abbot) on Apr 28, 2014 at 11:52 UTC
You can also use a repeat specifier: `GetOptions ( "prueba2=s{1,}" => \@array, ) or die "not working: $!\n";` [download] `s{1,}` means at least one. So you just need to type `-p 1 2 3` instead of `-p 1 -p 2 -p 3` - if like to save some energy ;-) Regards, Karl ŤThe Crux of the Biscuit is the Apostropheť	[reply] [d/l] [select]