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Think about Loose Coupling

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This does it:
#!/usr/bin/perl -w use Data::Dumper; %hash1 = ( red => 1, brown => { green => 1, blue => { yellow => 1, }, black => 1, }, gray => 1, ); %hash2 = ( white => 1, brown => { purple => 1, }, ); # merge ( \%hash1, \%hash2 ) returns the merge # If the two hashes have a common (possibly deep) key # not pointing to hashes, it dies trying to force # the reference to a hash reference sub merge { my ( $h1, $h2 ) = @_; my %h3; for my $key ( keys %$h1 ) { if ( exists $h2->{$key} ) { $h3{$key} = merge( $h1->{$key}, $h2->{$key} ); } else { $h3{$key} = $h1->{$key}; } } for my $key ( keys %$h2 ) { unless ( exists $h1->{$key} ) { $h3{$key} = $h2->{$key}; } } return \%h3; } print Dumper ( merge( \%hash1, \%hash2 ) );

In reply to Re: Merging hashes by abell
in thread Merging hashes by hotshot

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