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package Object::Array; |
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use strict; |
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use warnings; |
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use Scalar::Util (); |
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use Module::Pluggable (require => 1); |
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for my $plugin (__PACKAGE__->plugins) { |
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$plugin->import('-all'); |
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} |
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use Sub::Exporter -setup => { |
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exports => [ Array => \&_array_generator ], |
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}; |
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use 5.006001; |
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1480
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=head1 NAME |
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Object::Array - array references with accessors |
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=head1 VERSION |
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Version 0.060 |
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=cut |
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our $VERSION = '0.060'; |
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=head1 SYNOPSIS |
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use Object::Array qw(Array); |
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my $array = Object::Array->new; # or |
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$array = Object::Array->new(\@array); # or |
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$array = Array(\@array); |
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$array->push(1..5); |
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print $array->shift; |
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$_++ for grep { $_ < 4 } @{ $array }; |
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$array->[0] = "a pony"; |
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=head1 IMPORTANT NOTE |
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Several of these methods do not behave exactly like their |
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builtin counterparts. |
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Specifically, any method that you would expect to return a |
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list does so, but B. In scalar |
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context, these methods will return an Object::Array object |
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constructed from a copy of the list that would have been |
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returned. |
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This sounds more complicated than it is. It means that you |
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can chain some methods together, e.g. |
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$arr->grep(sub { defined })->[-1]; |
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instead of the more bracing |
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${ $arr->grep(sub { defined }) }[-1]; |
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Currently, these array objects only contain copies of the |
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original values. In the future, they will retain references |
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to the original object, and this sort of thing will be possible: |
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$arr->grep(sub { defined })->[-1]++; |
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=head1 METHODS |
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=head2 new |
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my $array = Object::Array->new; |
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# or use existing array |
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my $array = Object::Array->new(\@a); |
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Creates a new array object, either from scratch or from an |
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existing array. |
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Using an existing array will mean that any changes to C<< |
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$array >> also affect the original array object. If you |
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don't want that, copy the data first or use something like |
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Storable's C<< dclone >>. |
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=head2 isa |
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Overridden to respond to 'ARRAY'. |
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=head2 ref |
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Returns a reference to the underlying array. |
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=cut |
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my %real; |
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845
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sub _addr { Scalar::Util::refaddr($_[0]) } |
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26164
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sub _real { $real{shift->_addr} } |
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*ref = \&_real; |
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sub _array { |
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my ($self, @values) = @_; |
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return wantarray ? @values : ref($self)->new(\@values); |
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} |
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106
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# for exporting |
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sub _array_generator { |
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my ($class) = @_; |
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return sub { $class->new(@_) }; |
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} |
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use overload ( |
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3
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q(@{}) => 'ref', |
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fallback => 1, |
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); |
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116
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sub new { |
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my $class = shift; |
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my $real = shift || []; |
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my $self = bless \$real => $class; |
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$real{$self->_addr} = $real; |
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return $self; |
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} |
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sub isa { |
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my ($class, $type) = @_; |
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return 1 if $type eq 'ARRAY'; |
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1
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return $class->SUPER::isa($type); |
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} |
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=head1 SEE ALSO |
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140
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=head1 AUTHOR |
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142
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Hans Dieter Pearcey, C<< >> |
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=head1 BUGS |
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146
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Please report any bugs or feature requests to |
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C, or through the web interface at |
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L. |
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I will be notified, and then you'll automatically be notified of progress on |
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your bug as I make changes. |
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152
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=head1 SUPPORT |
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154
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You can find documentation for this module with the perldoc command. |
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156
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perldoc Object::Array |
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158
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You can also look for information at: |
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160
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=over 4 |
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162
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=item * AnnoCPAN: Annotated CPAN documentation |
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164
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L |
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166
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=item * CPAN Ratings |
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L |
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170
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=item * RT: CPAN's request tracker |
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L |
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174
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=item * Search CPAN |
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L |
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178
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=back |
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=head1 ACKNOWLEDGEMENTS |
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182
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=head1 COPYRIGHT & LICENSE |
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184
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Copyright 2006 Hans Dieter Pearcey, all rights reserved. |
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186
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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189
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=cut |
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191
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1; # End of Object::Array |