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.\" ========================================================================
.\"
.IX Title "JSON::MultiValueOrdered 3pm"
.TH JSON::MultiValueOrdered 3pm "2014-09-11" "perl v5.20.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
JSON::MultiValueOrdered \- handle JSON like {"a":1, "a":2}
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&   use Test::More tests => 4;
\&   use JSON::MultiValueOrdered;
\&   
\&   my $j = JSON::MultiValueOrdered\->new;
\&   isa_ok $j, \*(AqJSON::Tiny\*(Aq;
\&   
\&   my $data = $j\->decode(<<\*(AqJSON\*(Aq);
\&   {
\&      "a": 1,
\&      "b": 2,
\&      "a": 3,
\&      "b": 4
\&   }
\&   JSON
\&   
\&   # As you\*(Aqd expect, for repeated values, the last value is used
\&   is_deeply(
\&      $data,
\&      { a => 3, b => 4 },
\&    );
\&   
\&   # But hashes within the structure are tied to Tie::Hash::MultiValueOrdered
\&   is_deeply(
\&      [ tied(%$data)\->get(\*(Aqb\*(Aq) ],
\&      [ 2, 4 ],
\&    );
\&   
\&   # And the extra information from the tied hash is used when re\-encoding
\&   is(
\&      $j\->encode($data),
\&      q({"a":1,"b":2,"a":3,"b":4}),
\&   );
\&   
\&   done_testing;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \s-1JSON\s0 specification allows keys to be repeated within objects. It remains
silent on how repeated keys should be interpreted. Most \s-1JSON\s0 implementations
end up choosing just one of the values; sometimes the first, sometimes the
last.
.PP
JSON::MultiValueOrdered is a subclass of JSON::Tiny which treats objects as
ordered lists of key-value pairs, with duplicate keys allowed. It achieves this
by returning all hashes as tied using Tie::Hash::MultiValueOrdered. While
these hashes behave like standard Perl hashes (albeit while preserving the
original order of the keys), they provide a tied object interface allowing you
to retrieve additional values for each key.
.PP
JSON::MultiValueOrdered serialisation also serialises these additional values
and preserves order.
.PP
JSON::MultiValueOrdered is a subclass of JSON::Tiny::Subclassable and
JSON::Tiny, which is itself a fork of Mojo::JSON. Except where noted,
the methods listed below behave identically to the methods of the same names
in the superclasses.
.SS "Constructor"
.IX Subsection "Constructor"
.ie n .IP """new(%attributes)""" 4
.el .IP "\f(CWnew(%attributes)\fR" 4
.IX Item "new(%attributes)"
.SS "Attributes"
.IX Subsection "Attributes"
.PD 0
.ie n .IP """pretty""" 4
.el .IP "\f(CWpretty\fR" 4
.IX Item "pretty"
.ie n .IP """error""" 4
.el .IP "\f(CWerror\fR" 4
.IX Item "error"
.PD
.SS "Methods"
.IX Subsection "Methods"
.ie n .IP """decode($bytes)""" 4
.el .IP "\f(CWdecode($bytes)\fR" 4
.IX Item "decode($bytes)"
.PD 0
.ie n .IP """encode($ref)""" 4
.el .IP "\f(CWencode($ref)\fR" 4
.IX Item "encode($ref)"
.ie n .IP """false""" 4
.el .IP "\f(CWfalse\fR" 4
.IX Item "false"
.ie n .IP """true""" 4
.el .IP "\f(CWtrue\fR" 4
.IX Item "true"
.PD
.SS "Functions"
.IX Subsection "Functions"
.ie n .IP """j(\e@array)"" / ""j(\e%hash)"" / ""j($bytes)""" 4
.el .IP "\f(CWj(\e@array)\fR / \f(CWj(\e%hash)\fR / \f(CWj($bytes)\fR" 4
.IX Item "j(@array) / j(%hash) / j($bytes)"
Encode or decode \s-1JSON\s0 as applicable.
.Sp
This function may be exported, but is not exported by default. You may
request to import it with a different name:
.Sp
.Vb 1
\&   use JSON::MultiValueOrdered j => { \-as => \*(Aqquick_json\*(Aq };
.Ve
.SH "BUGS"
.IX Header "BUGS"
Please report any bugs to
<http://rt.cpan.org/Dist/Display.html?Queue=JSON\-MultiValueOrdered>.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
JSON::Tiny::Subclassable,
JSON::Tiny,
Mojo::JSON.
.PP
Tie::Hash::MultiValueOrdered.
.SH "AUTHOR"
.IX Header "AUTHOR"
Toby Inkster <tobyink@cpan.org>.
.SH "COPYRIGHT AND LICENCE"
.IX Header "COPYRIGHT AND LICENCE"
This software is copyright (c) 2012\-2013 by Toby Inkster.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
.SH "DISCLAIMER OF WARRANTIES"
.IX Header "DISCLAIMER OF WARRANTIES"
\&\s-1THIS PACKAGE IS PROVIDED \*(L"AS IS\*(R" AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.\s0