If you want them sorted, you either have to use
foreach $key ( sort keys %hash )
Or if they are to be kept in the order in which they were defined (ie: chronological), you need to keep the keys in a separate array for sorting purposes:
foreach $key ( @key_list )
{
print "$key: $hash{$key}\n" if exists $hash{$key};
}
See man perldata or perldsc for more information than you ever wanted to know.
Steve
On 22.09.2005 19:59 Uhr, "neelay thaker" wrote:
Hi,
when I parse a list of comma separated IP addresses, put them into an array and then transfer the elements of the array into a hash, the hash elements get printed in reverse order as compared to the array and the input. The following code and output will make this problem clear.
The code snipet is this-
$arrsize = @ipaddr;
for( $ctr = 0 ; $ctr < $arrsize ; $ctr++ )
{
$ip_intf_hash{ $ipaddr[$ctr] } = "";
print $ipaddr[$ctr];
print " : ";
}
print "\n";
print "You entered the IPaddresses:\n";
foreach $nfr ( keys %ip_intf_hash )
{
print "$nfr : ";
}
print "\n";
The output looks like this-
Enter the IP addresses: 2.2.2.2 <http://2.2.2.2> ,3.3.3.3 <http://3.3.3.3> ,1.1.1.1 <http://1.1.1.1>
2.2.2.2 <http://2.2.2.2> : 3.3.3.3 <http://3.3.3.3> : 1.1.1.1 <http://1.1.1.1> :
You entered the IP addresses:
1.1.1.1 <http://1.1.1.1> : 3.3.3.3 <http://3.3.3.3> : 2.2.2.2 <http://2.2.2.2> :
Any ideas on why the hash elements get reversed?
Thanks.
Neelay.
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