On Mon, 12 Aug 2002, Theuerkorn Johannes wrote:
> Hi there,
>
> I still got Problems with hashes.
>
> I have the following code:
>
> Now i want to call the Sub not onla once, but I donīt want to lose the previous
>Values, so I tried this in the sub:
>
> push @{$ergebnis{$seriennr}},
>{tstamp=>@tstamp_board,serial=>@serial,retests=>@retests,fwrev=>@fwrev,hwrev=>@hwrev,hp79k=>@hp79k,platz=>@platz,passfail=>@passfail};
Phew!! after all those arrays finally a hash :-)
tstamp=>@tstamp_board will not work the way you are expecting
it to. Run this piece of code and see for yourself. The value to
a hash key can only be a scalar.
use strict;
use Data::Dumper;
my @tstamp_board = (1, 2, 3);
my %ergebnis = (tstamp => @arr);
print Dumper(\%ergebnis);
What you need is to store the reference of @tstamp_board in tstamp.
tstamp => [@tstamp_board]
If @tstamp_board is not being my'ed in the loop everytime a \@tstamp_board
will result in shallow copying. So, don't do that
http://www.stonehenge.com/merlyn/UnixReview/col30.html
>
> But if I try to read the Values from it:
>
> my $erg= $ergebnis{$seriennr};
$ergebnis{$seriennr} is a reference to an array of hashes or hash
references.
>
> print $$erg->{passfail}[0];
This should be like this
print $erg->[0]{passfail};
You will have to get to the array before getting to the hashes, a lot
like your post :-)
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