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## -------------------------------------------------------------------------------- |
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## $Id: Common.pm,v 1.1 2002/10/10 03:26:00 cvsjoko Exp $ |
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## -------------------------------------------------------------------------------- |
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## $Log: Common.pm,v $ |
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## -------------------------------------------------------------------------------- |
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|
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|
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package Data::Compare::Struct; |
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|
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use strict; |
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use warnings; |
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|
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require Exporter; |
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our @ISA = qw( Exporter ); |
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our @EXPORT_OK = qw( |
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&getRelations |
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&getDifference |
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&isEmpty |
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); |
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|
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use Data::Dumper; |
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|
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sub getRelations { |
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my $a_ref = shift; |
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my $b_ref = shift; |
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my @a = @{$a_ref}; |
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my @b = @{$b_ref}; |
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|
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my @isect = my @diff = my @union = (); |
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my $e; |
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my %count; |
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|
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foreach $e (@a, @b) { $count{$e}++ } |
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|
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foreach $e (keys %count) { |
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push(@union, $e); |
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push @{ $count{$e} == 2 ? \@isect : \@diff }, $e; |
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} |
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|
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# bugfix: a diff is no diff if we don't even have an isect |
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@diff = undef if !@isect; |
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|
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my $result = { |
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union => \@union, |
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isect => \@isect, |
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diff => \@diff, |
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}; |
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|
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return $result; |
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|
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} |
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|
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sub getDifference { |
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my $res = getRelations(shift, shift); |
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return $res->{diff}; |
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} |
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|
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sub isEmpty { |
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my $var = shift; |
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my $reftype = attributes::reftype($var); |
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|
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if ($reftype eq 'HASH') { |
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foreach (keys %$var) { |
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return 0 if defined $var->{$_}; |
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} |
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|
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} elsif ($reftype eq 'ARRAY') { |
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foreach (@$var) { |
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return 0 if defined $_; |
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} |
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} |
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|
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return 1; |
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} |
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|
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1; |
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