You don't really push to a hash, you can - but push is usually reserved for array (and yes, a hash is an array). My point is that you assign a value to a hash key - that value can be a scalar (the value), a reference (the pointer), or other things.

Here is an example that reads 'configuration info' from Perl's built in DATA filehandle. I use DATA because it's easy and you only need one file for demonstrations. Anyhow, the configuration is simply two values seperated by a comma per line. The while loop processes DATA one line at a time and creates a new struct object with the values it finds. After the struct is instantiated, it is pushed to an array. Since it is already a reference there is no need to de-reference it. The last line is a for loop that prints out only one of the attributes for each struct in the array.

use strict;
use Class::Struct;

# declare the struct
struct(MyStruct => {
   even => '$',
   odd  => '$',
});

# create array of structs
my @structs;
while (my $line = <DATA>) {
   chomp $line;
   my ($odd,$even) = split(',',$line);

   my $obj = new MyStruct;
   $obj->odd($odd);
   $obj->even($even);

   push(@structs,$obj);
}

print $_->odd(), "\n" foreach (@structs);

__DATA__
one,two
three,four
five,six
seven,eight
nine,ten
[download]

But hold it right there! Why are you using Class:Struct? No offense to the author, but if you are going to code in Perl, code like Perl. Check this out:

use strict;

# create array of structs
my @structs;
while (my $line = <DATA>) {
   chomp $line;
   my ($odd,$even) = split(',',$line);
   my %hash = (
      odd  => $odd,
      even => $even,
   );
   # i do have to de-reference %hash though
   push(@structs,\%hash);
}

print $_->{'odd'}, "\n" foreach (@structs);

__DATA__
one,two
three,four
five,six
seven,eight
nine,ten
[download]

Same thing with less lines, and i spared using map to golf it down even further ... oh what the hell:

print $_->{odd},"\n"for map{my($o,$e)=split',',$_;{odd=>$o,even=>$e}}<
+DATA>;
[download]

Welcome to Perl. :)

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
F--F--F--F--F--F--F--F--
(the triplet paradiddle)

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