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package DataStruct::Flat; |
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69658
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use Moo; |
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our $VERSION = '0.01'; |
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sub flatten { |
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my ($self, $struct) = @_; |
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my $result = {}; |
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_flatten($struct, undef, $result); |
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return $result; |
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} |
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sub _flatten { |
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my ($struct, $prefix, $result) = @_; |
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if (ref($struct) eq 'HASH') { |
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foreach my $key (keys %$struct) { |
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my $local_prefix = (defined $prefix) ? "$prefix." : ""; |
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my $key_in_result = $key; |
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$key_in_result =~ s/\./\\./g; |
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_flatten($struct->{ $key }, "$local_prefix$key_in_result", $result); |
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} |
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} elsif (ref($struct) eq 'ARRAY') { |
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my $i = 0; |
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foreach my $element (@$struct) { |
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my $local_prefix = (defined $prefix) ? "$prefix." : ""; |
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_flatten($element, "$local_prefix$i", $result); |
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$i++; |
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} |
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} else { |
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my $local_prefix = (defined $prefix) ? $prefix : ''; |
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$result->{ $prefix } = $struct; |
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} |
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} |
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1; |
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#################### main pod documentation begin ################### |
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=head1 NAME |
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DataStruct::Flat - Convert a data structure into a one level list of keys and values |
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=head1 SYNOPSIS |
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use DataStruct::Flat; |
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my $flattener = DataStruct::Flat->new; |
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my $flat = $flattener->flatten({ |
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a => [ 7, 8, 9, 10 ], |
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b => { c => d }, |
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}); |
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# $flat = { |
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# 'a.0' => 7, |
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# 'a.1' => 8, |
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# 'a.2' => 9, |
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# 'a.3' => 10, |
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# 'b.c' => 'd' |
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# }; |
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=head1 DESCRIPTION |
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This module converts a nested Perl data structure into a one level hash of keys and values |
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apt for human consumption. |
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=head1 METHODS |
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=head2 new |
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Constructor. Initializes the flattener object |
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=head2 flatten($struct) |
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Returns a hashref for $struct which contains keys with dotted "paths" to the respective |
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values in the datastructure. |
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=head1 CONTRIBUTE |
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The source code is located here: https://github.com/pplu/datastruct-flat |
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=head2 SEE ALSO |
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L |
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86
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=head1 AUTHOR |
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Jose Luis Martinez |
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CPAN ID: JLMARTIN |
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CAPSiDE |
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jlmartinez@capside.com |
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http://www.pplusdomain.net |
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=head1 COPYRIGHT |
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Copyright (c) 2019 by CAPSiDE |
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=head1 LICENSE |
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Apache 2.0 |
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=cut |