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## ------------------------------------------------------------------------- |
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## $Id: Exception.pm,v 1.2 2003/02/20 20:53:55 joko Exp $ |
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## ------------------------------------------------------------------------- |
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## $Log: Exception.pm,v $ |
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## ------------------------------------------------------------------------- |
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|
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|
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package Tie::SummableHash; |
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|
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use strict; |
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use warnings; |
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|
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use base qw( Hash::Serializer ); |
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|
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use overload |
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'+=' => \&sum_hash, |
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; |
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|
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use Tie::IxHash; |
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use Data::Dumper; |
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|
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|
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sub new { |
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#print "new: ", __PACKAGE__, "\n"; |
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my $class = shift; |
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my $value = shift; |
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tie(%{$value}, "Tie::IxHash"); |
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return bless \$value => $class; |
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} |
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|
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|
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sub sum_hash { |
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|
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#print Dumper(@_); |
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my ($x, $y) = @_; |
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#print "x: "; |
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#print Dumper($x); |
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#print "y: "; |
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#print Dumper($y); |
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my $value = $$x; |
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|
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#$value->{sumCount}++; |
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foreach my $key (keys %{$y}) { |
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# initialize key if undefined yet to prevent "Use of uninitialized value in addition (+) at [...]" |
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$value->{$key} ||= 0; |
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# sum up statistic-counts |
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$value->{$key} += $y->{$key}; |
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} |
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|
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return bless \$value => ref($x); |
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} |
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|
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1; |
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__END__ |
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