I changed your program slightly, added strict and warnings, corrected the line where @values is set and added sample data:

#!/usr/bin/perl
use strict;
use warnings;


my %hash;
my $l;
my @values;

while (<DATA>)
{
   chomp;
   my ($key, $rest) = split /-/;
   push @{$hash{$key}},$rest;
  
}
$l=14;
  @values= exists $hash{$l} ? @{$hash{$l}}:undef;
{
print "\n Hash Value of 14 : @{$hash{$l}} \n";
}

exit(0);

__DATA__
5-ax
14-vor
65-em
14-auf
14-ab

[download]

When I run this I get the following result:


 Hash Value of 14 : vor auf ab

[download]

which to my eye looks good. What did you expect? If you just want the first value of the array instead of the complete array printed, you could use this for example:

if (exists $hash{$l} and @{$hash{$l}}>0) {
  print "Hash value of $l is $hash{$l}->[0]\n"; #or the short form $ha
+sh{$l}[0]
}
else {
  print "Nothing found for $l\n";
}

[download]

In reply to Re: conditional exists by jethro
in thread conditional exists by Anonymous Monk

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